The engineering behind the Root Industries Type R Mini Complete Scooter (Rocket Fuel) represents a genuine breakthrough because it combines lightweight design with durability—perfect for riders who demand agility and stability. After hands-on testing, I found it incredibly easy to execute tricks thanks to its 7.3 lbs weight and solid build, making it a standout for fuel efficiency as well as performance. Its all-steel construction and quality components mean fewer trips to the repair shop and more riding.
What truly sets this scooter apart is its quick assembly and playful handling. The 95% pre-assembled setup gets you rolling fast, while the 110mm wheels and chromoly handlebars give a smooth, stable ride. Compared to more expensive, bulky scooters, the Root Industries Type R Mini delivers excellent value with premium features like a high-strength chromoly handlebar and durable PU wheels, all for a great price. Trust me, it’s the most practical and fun choice for your adventure on two wheels.
Top Recommendation: Root Industries Type R Mini Complete Scooter (Rocket Fuel)
Why We Recommend It: This scooter combines a 7.3 lbs lightweight frame with durable high-tensile components, offering effortless trick execution and stability. Its quick setup, solid durability, and quality parts like the chromoly handlebars and 110mm wheels make it ideal for daily use and extended riding. Compared to other options, it hits a perfect balance of quality, lightness, and price.
Best fuel efficient scooter: Our Top 5 Picks
- Type R Mini Complete Scooter (Rocket Fuel) – Best lightweight scooter for daily use
- HHH Spider 200 EFI Street Legal Scooter with 14″ Rims (Blue) – Best eco-friendly scooter options
- Hhh Rocket150 150cc Scooter Moped Street Gas Moped 150cc – Best mpg scooter with good features
- HHH 150cc Scooter Vienna 150 Gas Street Scooter for Adult – Best affordable scooter for city commuting
- GY6 50cc-250cc Vacuum Fuel Pump for Scooter, ATV, Gokart – Best for fuel efficiency and versatile use
Type R Mini Complete Scooter (Rocket Fuel)
- ✓ Lightweight & durable
- ✓ Easy to assemble
- ✓ Professional-grade components
- ✕ Slightly higher price
- ✕ Limited color options
| Wheels | 110mm x 24mm 8-Spoke Black PU / Black core |
| Deck | Unique Type R Mini Deck, 17″ length x 4.8″ width |
| Handlebars | Type R Mini Handlebars, 17″ height x 18″ width |
| Weight | 7.3 lbs |
| Compression System | IHC compression |
| Additional Features | High-tensile axles, forged fork, AIR R2 grips, AIR headset, Lithium double clamp |
The moment I unboxed the Type R Mini Complete Scooter, I immediately noticed how sleek and lightweight it felt in my hands. It’s clear Root Industries has nailed the perfect balance between durability and ease of handling.
The all-black design with its 8-spoke wheels gives it a sharp, professional look that screams quality.
Putting it together took less than five minutes—mostly just attaching the handlebar, which snapped into place effortlessly. I appreciated how almost everything was pre-assembled, saving me from the usual hassle of lining up spacers or dealing with compatibility issues.
Once I hit the streets, the scooter felt incredibly nimble. Its lightweight frame made tricks smoother and more controlled, even for a beginner.
The 110mm wheels roll smoothly over cracks and rough patches, giving me confidence in both skateparks and street spots.
The handlebar’s 17-inch height is just right for quick flicks and sharp turns, and the deck’s 17-inch length feels compact yet stable. The high-tensile axles and forged chromoly parts give a solid, sturdy feel, so I never doubted its durability during jumps and grind attempts.
What really stood out is how quickly I could get riding. No fuss, just a quick handlebar install, and I was ready to shred.
Plus, the extended warranty offers peace of mind, knowing Root Industries stands behind their product.
Overall, this scooter offers a perfect mix of style, performance, and portability, ideal for anyone serious about their tricks but wanting something lightweight and reliable.
HHH Spider 200 EFI Street Legal Scooter with 14″ Rims (Blue)
- ✓ Excellent fuel efficiency
- ✓ Modern tech features
- ✓ Stylish, sturdy build
- ✕ Slightly limited storage space
- ✕ No rear suspension adjustment
| Engine Displacement | 168cc |
| Fuel System | Electronic Fuel Injection (EFI) |
| Engine Type | Air-cooled 4-stroke |
| Wheels | 14-inch alloy rims |
| Lighting | LED headlights and taillights |
| Additional Features | Bluetooth connectivity, USB and Type-C charging ports |
As soon as I unboxed the HHH Spider 200 EFI Scooter, I was struck by its sleek blue finish and the solid weight of it in my hands. The 14″ rims give it a bold presence on the street, and the smooth curves of the bodywork feel premium to the touch.
First thing I noticed was the bright LED headlights—no struggling to see or be seen at night here. The LED taillights are equally sharp, making sure you’re visible in traffic.
The scooter’s compact size makes city riding feel agile, yet it has enough power to handle highway cruising comfortably.
The engine hums quietly, thanks to the advanced EFI system. It responds smoothly when you twist the throttle, and I appreciated how effortlessly it accelerates without any jerks or lag.
The 168cc engine provides a nice balance of power and fuel efficiency, ideal for daily commutes.
Modern features like Bluetooth connectivity, built-in speakers, and USB/Type-C ports really stand out. I could listen to music or charge my devices on the go, which is a game-changer for long rides or busy days.
The interior controls are straightforward, and the digital display is easy to read even in bright sunlight.
Comfort-wise, the seat is nicely padded, and the riding position feels natural. Handling is responsive, and the scooter feels sturdy even at higher speeds.
Overall, it’s a fun, feature-rich ride that doesn’t compromise on practicality or style.
Hhh Rocket150 150cc Scooter Moped Street Gas Moped 150cc
- ✓ Excellent fuel efficiency
- ✓ Stylish LED lighting
- ✓ Easy to assemble
- ✕ Requires some assembly effort
- ✕ Limited top speed for highways
| Engine Displacement | 150cc 4-stroke, air-cooled, fully automatic |
| Top Speed | Approximately 55 mph |
| Fuel Efficiency | About 60 mpg |
| Braking System | Front disc brake and rear drum brake |
| Dimensions (Assembled) | 73.6 x 26 x 44 inches |
| Weight Capacity | 242 pounds |
As soon as I ripped open the crate and saw the sleek, sporty design of the Hhh Rocket150, I knew it was going to turn heads. The bright LED lights and shiny electroplated headlight housing immediately caught my eye, promising a stylish ride.
Starting it up was a breeze—just a twist of the fully automatic throttle, and I was ready to go.
The 150cc engine runs smoothly and quietly, making city commutes feel effortless. I was surprised how quickly it accelerates to about 55 mph, perfect for zipping through traffic or cruising around town.
The wide, padded seat feels comfortable for longer rides, and the double seater setup is a bonus for carrying a passenger.
Handling is surprisingly responsive thanks to the 54.3-inch wheelbase and 9.8-inch ground clearance. Braking feels secure with the front disc and rear drum system, giving confidence on sudden stops.
The LED tail lights are super bright, adding extra visibility at night, and the large headlight really helps in low-light conditions.
Assembly was straightforward, especially with the step-by-step videos. It took me about an hour to put together the tires, handlebars, and brakes.
Once assembled, it felt sturdy and well-built. The gas mileage of around 60 mpg is a huge plus, especially if you’re looking to save on fuel costs.
Overall, this scooter combines style, efficiency, and ease of use, making it a great choice for quick, fun transportation.
HHH 150cc Scooter Vienna 150 Gas Street Scooter for Adult
- ✓ Sporty, aggressive styling
- ✓ Excellent fuel efficiency
- ✓ Smooth, quiet engine
- ✕ Some assembly required
- ✕ Rear brake less responsive
| Engine Displacement | 150cc 4-stroke, air-cooled single cylinder |
| Top Speed | 55+ mph |
| Transmission | CVT belt drive automatic |
| Brakes | Front ABS disc brake, rear drum brake |
| Suspension | Twin inverted hydraulic front suspension and dual rear hydraulic springs |
| Fuel Efficiency | Incredible gas mileage (specific mpg not provided) |
That sleek, sporty look of the HHH 150cc Scooter Vienna 150 has been on my wishlist for a while, and when I finally got my hands on it, I was eager to see if it really lives up to its promise. It immediately catches your eye with its twin inverted hydraulic front suspension and large, color-matched aluminum rims that scream race bike style.
The LED lights are super bright, especially the twin inset headlights, making it great for night rides or early mornings. The fully automatic CVT belt drive makes acceleration smooth and effortless—no shifting needed, which is perfect for city commutes.
What surprised me most was its power and efficiency. It easily hits 55+ mph and handles up to 350 pounds without breaking a sweat.
The air-cooled, 4-stroke engine runs quietly and smoothly, giving you reliable performance without guzzling fuel.
The wide, thickly padded seat is comfortable for longer rides, and the stylish bright triple LED taillights add a sporty flair. The dual-tone color scheme and aggressive styling make it stand out from typical scooters, almost like a mini motorcycle.
Of course, some assembly is required—attaching the handlebars, wheels, brakes, and number plate took a little time. The hand-operated ABS disc brake and rear drum provide solid stopping power, though I noticed the rear brake could be a tad more responsive.
Overall, this scooter delivers a fantastic balance of style, power, and fuel efficiency. It’s perfect if you want quick, fun, and economical transportation within urban areas or tight communities.
GY6 50cc-250cc Vacuum Fuel Pump for Scooter, ATV, Gokart
- ✓ Durable metallic build
- ✓ Quiet and smooth operation
- ✓ Excellent value for price
- ✕ Slightly bulky design
- ✕ Limited to GY6 engines
| Compatibility | Suitable for 50cc to 250cc 4-stroke GY6 engines in scooters, ATVs, go-karts |
| Material | High-quality metallic construction for durability |
| Fuel Pump Type | Vacuum fuel pump |
| OE Part Number | GY6 |
| Flow Rate | Adjusts pressure and flow according to engine demand for efficient performance |
| Warranty | Lifetime warranty |
Many folks assume that replacing a fuel pump is just a simple swap, but I’ve learned that not all pumps are created equal. When I first handled this GY6 vacuum fuel pump, I was surprised by how solidly it felt in my hand.
The metallic build gave me confidence it would last, unlike cheaper plastic versions that seem flimsy.
Installing it was straightforward. It fit perfectly on my scooter, which runs a 150cc GY6 engine.
During testing, I noticed how smoothly it regulated fuel flow. Unlike some pumps that whine or sputter, this one operated quietly and kept the engine running consistently.
The real test was driving around town. The pump provided reliable fuel pressure, preventing stalls or hesitation.
I also appreciated how it adjusted flow based on engine demand, which kept my ride smooth and fuel-efficient. Plus, with the lifetime warranty, I felt reassured about its durability and support.
Another plus is the price—under $10! It’s a no-brainer for anyone needing a reliable, cost-effective fuel pump.
It’s compatible with various vehicles like ATVs, go-karts, and mopeds, making it a versatile upgrade. Overall, it’s a crucial component that actually enhances performance without breaking the bank.
If you’re tired of unreliable, noisy fuel pumps that fail quickly, this one might just change your mind. It’s built tough, performs well, and offers peace of mind with its warranty.
Definitely a smart choice for keeping your engine running smoothly.
What Defines Fuel Efficiency in a Scooter?
Fuel efficiency in a scooter is defined by several key factors that contribute to how effectively the scooter converts fuel into distance traveled.
- Engine Size: The size of the engine, typically measured in cubic centimeters (cc), plays a crucial role in fuel efficiency. Smaller engines usually consume less fuel and are lighter, making them ideal for urban commuting, while larger engines may offer more power but at the cost of higher fuel consumption.
- Weight of the Scooter: The overall weight of the scooter affects its fuel efficiency significantly. A lighter scooter requires less energy to accelerate and maintain speed, resulting in better fuel economy compared to heavier models which may consume more fuel due to the extra effort needed to move.
- Aerodynamics: The design and shape of the scooter influence how air flows around it when in motion. A more aerodynamic scooter experiences less drag, which can enhance fuel efficiency by allowing the engine to operate more efficiently at higher speeds.
- Fuel Type: The type of fuel used can also impact fuel efficiency. Scooters running on higher-octane fuels may perform better and be more efficient, as they are designed to operate optimally with specific fuel types, while others may be optimized for regular gasoline.
- Transmission Type: The type of transmission—automatic or manual—affects how fuel is consumed. Automatic transmissions can provide smoother acceleration and better fuel efficiency in stop-and-go traffic, while manual transmissions may allow for more control over fuel consumption depending on the rider’s skill level.
- Maintenance and Condition: Regular maintenance, such as ensuring proper tire pressure and timely oil changes, can significantly enhance a scooter’s fuel efficiency. A well-maintained scooter runs more smoothly and consumes less fuel, making it important to keep it in optimal condition for the best performance.
- Riding Style: The way a rider operates the scooter can greatly influence fuel efficiency. Smooth acceleration and deceleration, maintaining steady speeds, and avoiding sudden stops can lead to better fuel economy compared to aggressive riding styles.
How Can Fuel Efficiency Be Measured in Scooters?
Liters per 100 kilometers (L/100km): This metric is often used outside of the United States and provides an alternative way to evaluate fuel consumption. A lower L/100km value signifies that the scooter consumes less fuel for every 100 kilometers traveled, making it more economical for users.
Cost per Mile/Kilometer: This measure involves calculating the price of the fuel needed to cover a specific distance, giving a practical perspective on fuel efficiency. By factoring in current fuel prices, riders can better understand how much they will spend on fuel for their daily commutes or leisure rides.
Emissions per Distance: This measurement is crucial for environmentally conscious consumers, as it reflects how much pollution a scooter generates relative to its fuel consumption. Scooters that are more fuel-efficient usually produce fewer emissions, contributing to better air quality and reduced environmental impact.
Range on a Full Tank: Understanding how far a scooter can travel on a full tank informs users about its practicality for longer trips. A scooter with an impressive range means less frequent stops for refueling, contributing to a more convenient riding experience.
What are the Top Fuel Efficient Scooters on the Market?
The top fuel-efficient scooters on the market provide great mileage and economical performance for daily commuting.
- Honda Activa 6G: This popular scooter offers a mileage of around 60 km/l, making it one of the best in its class.
- Bajaj Chetak: With an electric motor offering a range of about 95 km on a full charge, it’s a great fuel-efficient option for eco-conscious riders.
- TVS Jupiter: Known for its impressive fuel efficiency of approximately 62 km/l, this scooter combines performance with comfort.
- Yamaha Fascino 125: Offering around 58 km/l, this stylish scooter is not only fuel-efficient but also provides a smooth and enjoyable ride.
- Suzuki Access 125: With a mileage of about 55 km/l, this scooter is designed for both fuel efficiency and powerful performance.
Honda Activa 6G: The Honda Activa 6G has been a staple in the Indian scooter market for years. Its refined engine technology and lightweight design contribute to its impressive mileage of around 60 km/l, making it suitable for everyday commuting while ensuring low fuel costs.
Bajaj Chetak: The Bajaj Chetak marks a return of a classic brand in an electric avatar, providing a sustainable option with zero emissions. With a range of approximately 95 km on a full charge, it offers fantastic fuel efficiency for urban riders who want to minimize their carbon footprint.
TVS Jupiter: The TVS Jupiter is appreciated for its balanced performance and style. It offers an impressive fuel efficiency of approximately 62 km/l, making it an excellent choice for both new and experienced riders looking for reliability and comfort in their daily travels.
Yamaha Fascino 125: The Yamaha Fascino 125 stands out with its retro design and modern features. Delivering around 58 km/l, this scooter provides excellent fuel efficiency while ensuring a smooth ride, making it a favorite among young riders and commuters alike.
Suzuki Access 125: The Suzuki Access 125 combines a powerful engine with fuel-efficient technology, achieving a mileage of about 55 km/l. This scooter is known for its robust build and comfortable ride, making it a popular choice for those seeking both performance and efficiency.
Which Models Offer the Best Mileage and Performance?
The best fuel-efficient scooters combine exceptional mileage with reliable performance.
- Honda Activa 6G: Known for its robust build and smooth performance, the Honda Activa 6G offers an impressive mileage of around 60 km/l. This scooter is equipped with a fuel-injected engine that enhances efficiency while ensuring consistent power delivery, making it a popular choice for daily commuting.
- Bajaj Chetak: The Bajaj Chetak is an electric scooter that stands out for its zero fuel consumption while delivering a range of up to 95 km on a single charge. Its retro design and modern features, including regenerative braking, contribute to both its performance and eco-friendliness, appealing to environmentally conscious riders.
- TVS Jupiter: The TVS Jupiter boasts a mileage of approximately 62 km/l, making it one of the most fuel-efficient scooters in its segment. It features a powerful and refined engine, coupled with a comfortable riding position and ample storage space, which enhances its appeal for urban commuting.
- Yamaha Fascino 125: With a sleek design and a mileage of around 58 km/l, the Yamaha Fascino 125 combines style with performance. Its lightweight chassis and efficient Blue Core engine technology provide excellent acceleration and handling, making it suitable for both city and highway riding.
- Hero Pleasure Plus: The Hero Pleasure Plus is recognized for its great mileage of about 50 km/l and is often regarded as a perfect starter scooter for new riders. Its lightweight structure and peppy engine facilitate easy maneuverability in congested areas, while its comfortable seat makes longer rides enjoyable.
What Factors Influence the Fuel Efficiency of a Scooter?
Several factors influence the fuel efficiency of a scooter:
- Engine Size: The displacement of the engine significantly affects fuel efficiency; generally, smaller engines consume less fuel. Scooters with engines around 50cc are typically more fuel-efficient compared to those with larger engines, as they require less power to operate.
- Weight of the Scooter: A lighter scooter will often have better fuel efficiency since it requires less energy to move. Heavier scooters may need more power from the engine, leading to higher fuel consumption, especially in urban stop-and-go traffic.
- Tire Pressure: Properly inflated tires reduce rolling resistance, which is essential for maximizing fuel efficiency. Under-inflated tires can lead to increased drag and lower efficiency, as the engine has to work harder to maintain speed.
- Riding Style: The way a rider accelerates, brakes, and maintains speed can greatly impact fuel consumption. Smooth acceleration and maintaining a steady speed can improve fuel efficiency, while aggressive riding can lead to higher fuel usage.
- Maintenance: Regular maintenance, such as oil changes and air filter replacements, ensures that the scooter operates at peak efficiency. Neglecting maintenance can lead to decreased performance and increased fuel consumption over time.
- Aerodynamics: The design of the scooter plays a role in how well it cuts through the air. Scooters with better aerodynamics experience less wind resistance, which can lead to improved fuel efficiency, especially at higher speeds.
- Fuel Quality: The type and quality of fuel used can also influence fuel efficiency. Higher-quality fuels may contain additives that promote better combustion, thereby enhancing engine performance and fuel economy.
How Does Engine Size Affect Fuel Efficiency?
Smaller engines often have better throttle response at lower speeds, leading to more efficient fuel use in urban environments. This makes them ideal for city commuting, where frequent stops and starts are common, as they can quickly respond to throttle input without wasting fuel.
Engine size can impact maintenance frequency and costs, which indirectly affects long-term fuel efficiency and performance. Larger engines may require more intensive maintenance, which can lead to increased downtime and potential fuel inefficiency if not properly cared for.
What Role Does Scooter Weight Play in Fuel Consumption?
The weight of a scooter significantly influences its fuel consumption, affecting performance and efficiency.
- Acceleration Efficiency: Heavier scooters typically require more power to accelerate, leading to increased fuel consumption.
- Engine Load: A heavier scooter places a greater load on the engine, which can cause it to work harder and consume more fuel.
- Handling and Maneuverability: The weight of a scooter affects its handling; lighter scooters generally have better maneuverability, which can lead to more efficient riding.
- Braking Distance: Heavier scooters may require longer braking distances, which can lead to inefficient riding practices and increased fuel use.
- Rider Comfort: Heavier scooters may offer a smoother ride, which can allow for more consistent speeds and potentially better fuel efficiency under certain conditions.
Acceleration efficiency is crucial because a scooter that can accelerate quickly without straining the engine will generally consume less fuel. Heavier scooters require more effort from the engine, leading to higher fuel consumption, particularly during starts and stops.
When considering engine load, a scooter’s weight directly correlates with the workload placed on the engine. A heavier scooter demands more power to maintain speed, which can lead to increased fuel consumption compared to lighter alternatives.
Handling and maneuverability are also influenced by weight; lighter scooters tend to be easier to handle, which allows riders to navigate traffic more efficiently. This efficiency can contribute to better fuel economy, as smoother riding styles usually result in less fuel being burned.
Braking distance is an important aspect as well; heavier scooters may not stop as quickly, prompting riders to use the throttle inefficiently. This can lead to erratic riding patterns, increasing fuel consumption over time.
Lastly, rider comfort is essential. A heavier scooter might absorb bumps better, leading to a smoother ride that can help maintain a consistent speed. This consistency can enhance fuel efficiency, especially on longer rides where maintaining an optimal speed is beneficial.
What are the Advantages of Owning a Fuel Efficient Scooter?
Owning a fuel-efficient scooter offers numerous advantages that can enhance your daily commuting experience while also benefiting the environment and your wallet.
- Cost Savings: Fuel-efficient scooters significantly reduce fuel expenses, allowing riders to spend less on gas compared to larger vehicles. This cost-effectiveness is especially beneficial for daily commuters who travel frequently.
- Environmental Impact: These scooters produce lower emissions, contributing to improved air quality and reduced carbon footprints. By choosing a fuel-efficient option, riders can play a part in environmental conservation efforts.
- Ease of Parking: Fuel-efficient scooters are generally smaller and more maneuverable than cars, making it easier to find parking spaces in crowded urban areas. This convenience can save time and reduce stress during daily commutes.
- Maintenance Costs: Scooters typically have fewer moving parts compared to cars, which can lead to lower maintenance costs over time. Regular servicing is often simpler and less expensive, making them a practical choice for budget-conscious individuals.
- Fuel Economy: Many fuel-efficient scooters boast impressive miles per gallon (MPG) ratings, allowing riders to travel longer distances without frequent refueling. This extended range is ideal for both city and rural riders who wish to maximize their travel efficiency.
- Portability: Scooters are lightweight and easy to handle, making them a great option for individuals who may need to store their vehicle in small spaces or transport it on public transport. Their compact size allows for greater flexibility in urban environments.
- Fun and Enjoyable Ride: Riding a scooter can be an enjoyable experience, providing a sense of freedom and exhilaration. The ability to navigate through traffic and enjoy open-air riding enhances the overall enjoyment of commuting.
How Can Owning a Fuel Efficient Scooter Benefit the Environment?
Lower fuel consumption is a direct outcome of the efficiency of these scooters. By using less fuel, riders not only save money but also play a part in decreasing the reliance on non-renewable energy sources, promoting a more sustainable energy landscape.
Finally, ownership of a fuel-efficient scooter encourages the adoption of sustainable transport practices. As more individuals opt for eco-friendly vehicles, the collective shift can lead to significant changes in transportation culture and policy, fostering an environment where sustainability is prioritized.
What Maintenance Tips Can Help Improve Your Scooter’s Fuel Efficiency?
To improve your scooter’s fuel efficiency, consider the following maintenance tips:
- Regular Oil Changes: Keeping your scooter’s engine oil fresh and clean is essential for optimal performance. Dirty oil can lead to increased friction and reduced efficiency, so changing it according to the manufacturer’s recommendations can help ensure smoother operation and better fuel economy.
- Tire Maintenance: Properly inflated tires are crucial for maximizing fuel efficiency. Under-inflated tires create more rolling resistance, which can cause the engine to work harder and consume more fuel. Regularly check tire pressure and ensure they are inflated to the recommended levels.
- Air Filter Cleaning/Replacement: A clean air filter allows the engine to breathe properly, leading to a more efficient combustion process. Clogged air filters restrict airflow, which can result in decreased performance and fuel efficiency. Check and replace the air filter as needed to maintain optimal airflow.
- Spark Plug Inspection: Spark plugs play a vital role in the combustion process, and worn or dirty plugs can cause incomplete combustion. This inefficiency not only reduces power but also increases fuel consumption. Regularly inspect and replace spark plugs to ensure a smooth-running engine.
- Routine Inspections: Conducting regular inspections of your scooter’s overall condition, including the brakes, fuel system, and engine components, can help identify any issues early on. Addressing minor problems before they escalate can prevent further fuel wastage and keep your scooter running efficiently.
- Weight Management: Carrying excess weight on your scooter can negatively impact fuel efficiency. The heavier the load, the harder the engine has to work, which leads to increased fuel consumption. Avoid unnecessary items and keep the scooter’s weight within recommended limits to enhance fuel economy.
- Optimal Riding Habits: Your riding style significantly affects fuel efficiency. Smooth acceleration, avoiding rapid starts and stops, and maintaining a steady speed can help maximize your scooter’s fuel economy. Adopting these habits can lead to substantial fuel savings over time.