Looking for the best fuel economy additives to save money and improve your vehicle’s performance? We’ve tested and compared top products to bring you the best options for both gasoline and diesel engines, ensuring smoother drives and fewer trips to the pump.
Fuel economy additives can make a big difference in how your engine runs. They help your car go farther on less gas, saving you money. This guide will show you the best options to boost your vehicle’s performance.
These additives clean your engine, reduce wear, and improve efficiency. They work for both gasoline and diesel engines. You’ll notice smoother drives and fewer trips to the pump.
We’ve tested and compared top products to find the best. Whether you drive a car, truck, or boat, there’s an additive for you. Let’s explore how these simple solutions can transform your ride.
List of Top 10 Fuel Economy Additives
| Image | Title | Best For | Price |
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Hot Shot’s Secret Gasoline Extreme 12 Oz, Concentrated Fuel System Cleaner, Fuel Additive for Gasoline Engines, Fuel Injector Cleaner – Increases Fuel Economy & Restores Engine Performance |
Gasoline engine owners who want a smoother ride, better fuel economy, and restored power without hassle. |
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STAR BRITE Star Tron Enzyme Fuel Treatment – Small Engine Formula – Gas Additive Rejuvenates & Stabilizes Old Gasoline – Cures & Prevents Ethanol Problems – 8 OZ (14308) |
This Star Tron Enzyme Fuel Treatment is perfect for anyone who owns any type of engine, from cars and boats to RVs and lawn mowers. It’s a game-changer for keeping your engines running smoothly and your fuel fresh, even if it’s been sitting for a while! |
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Hot Shot’s Secret Everyday Diesel Treatment (HSSEDT16ZS) 6-in-1 Diesel Fuel Additive – Treats 400 Gallons, Diesel Injector Cleaner, Diesel Fuel System Cleaner, Diesel Additive Boosts Cetane, 16oz |
This Hot Shot’s Secret Everyday Diesel Treatment is perfect for diesel vehicle owners who want to keep their engines running smoothly and efficiently. It’s a simple solution for better fuel economy and a longer-lasting engine. |
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Prolube Oil Treatment – Engine Oil Additive for Gas & Diesel Engines – Reduces Wear, Noise, Vibration – Boosts Fuel Economy & Horsepower – Works on Transmissions & Differentials (1QT) |
This Prolube Oil Treatment is perfect for car owners and truck drivers who want to boost their engine’s power, cut down on noise and vibrations, and save money on fuel. It’s also ideal for anyone looking to extend their engine’s life and ensure smooth, reliable performance for both gas and diesel engines. |
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Prolube Oil Treatment – Engine Oil Additive for Gas & Diesel Engines – Reduces Wear, Noise, Vibration – Boosts Fuel Economy & Horsepower – Works on Transmissions & Differentials (16oz) |
Prolube Oil Treatment is perfect for anyone who wants to keep their engine running smoothly and save on fuel costs. Whether you drive a car, truck, SUV, or use industrial machinery, this versatile additive works for gas and diesel engines, transmissions, and differentials. |
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Hot Shot’s Secret Everyday Diesel Treatment 1 Gallon, 6-in-1 Diesel Additive – Injector Cleaner, Fuel System Cleaner, Fuel Additive Boosts Cetane (HSSEDT01G) |
This diesel treatment is perfect for anyone who wants to keep their diesel engine running smoothly and save money on fuel and repairs. It’s easy to use and works great for daily drivers, truckers, or anyone with a diesel vehicle. |
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Opti-Lube XPD All-Season Diesel Fuel Additive – Gallon (1 Gallon (Treats 512 Gallons)) |
Truck owners and diesel equipment operators who demand peak performance, better fuel economy, and ironclad engine protection year-round. If you rely on your rig—whether logging miles cross-country or running heavy equipment on the job—Opti-Lube XPD is engineered for you. It’s the simple, cost-effective way to guard against wear, boost power, and keep injectors clean without breaking the bank. Every gallon treated costs just pennies. Keep your engine running strong, winter or summer—no exceptions. |
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DIPETANE 1L Fuel Additive | Improves Fuel Economy | Reduces Emissions | Keeps DPF Clean | Works with Diesel & Gasoline Engines | Cleans Injectors, EGR Valve & Sensors | Treats Up to 52 Gallons |
This DIPETANE 1L Fuel Additive is perfect for any driver looking to save money on fuel and keep their engine running smoothly. It’s ideal for those who want to reduce emissions and ensure their vehicle passes emission tests. |
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REV X Ultimate Diesel Fuel Additive (4 Pack) – Boosts Cetane, Fuel Economy, Cleans and Lubricates Fuel Injectors – 8 fl. oz. (Treats 100 Gallons) |
The REV X Ultimate Diesel Fuel Additive is perfect for diesel truck owners and heavy equipment operators who want to maximize their engine’s performance and fuel efficiency. This powerful additive cleans vital components, boosts horsepower, and protects against damage, ensuring your vehicle runs smoother, cleaner, and longer. |
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Hot Shot’s Secret Diesel Extreme 16oz, Concentrated Fuel System Cleaner, Diesel Fuel Additive, Injector Cleaner – Increases MPG & Restores Engine Performance |
This powerful fuel system cleaner is perfect for diesel truck owners and operators who want to boost their engine’s performance and improve fuel economy. If you’re looking to keep your injectors clean, increase power, and reduce maintenance, this is the solution for you! |
Detailed Reviews
Discover the top fuel economy additives that will transform your driving experience. Our guide reveals proven solutions for better mileage and engine health. Get ready to unlock significant savings and peak performance with our expert picks.
1. Hot Shot’s Secret Gasoline Extreme 12 Oz, Concentrated Fuel System Cleaner, Fuel Additive for Gasoline Engines, Fuel Injector Cleaner – Increases Fuel Economy & Restores Engine Performance
Hot Shot’s Secret Gasoline Extreme is a powerful fuel system cleaner for gasoline engines. It cleans, lubricates, and protects all parts of your engine and fuel system, like valves, pumps, and injectors.
It boosts fuel economy, restores engine performance, and fixes common issues like rough idling. Just pour 12 oz. into your fuel tank every 20 gallons or 10,000 miles for easy, effective results.
| Pros | Cons |
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Perfect For:
Gasoline engine owners who want a smoother ride, better fuel economy, and restored power without hassle.
Drivers frustrated by rough idling, clogged injectors, or sluggish performance will find an instant fix in one bottle.
Anyone serious about keeping their engine clean and efficient—pour it in, save gas, and feel the difference fast.
Ready to Purchase?
2. STAR BRITE Star Tron Enzyme Fuel Treatment – Small Engine Formula – Gas Additive Rejuvenates & Stabilizes Old Gasoline – Cures & Prevents Ethanol Problems – 8 OZ (14308)
Stop fighting with your engine. Star Tron’s advanced enzymes dissolve old fuel gunk, cure ethanol damage, and keep every part running smooth—no matter how long your machine’s been sitting.
Your fuel stays fresh and powerful. Even stale gasoline gets rejuvenated, starts easier, and burns cleaner for better mileage and fewer emissions. It’s science made simple.
Works anywhere, guaranteed. Cars, boats, mowers, RVs—all fuels, all engines. Proudly made in the USA since 1973. Just pour, protect, and go.
| Pros | Cons |
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Perfect For:
This Star Tron Enzyme Fuel Treatment is perfect for anyone who owns any type of engine, from cars and boats to RVs and lawn mowers. It’s a game-changer for keeping your engines running smoothly and your fuel fresh, even if it’s been sitting for a while!
Ready to Purchase?
3. Hot Shot’s Secret Everyday Diesel Treatment (HSSEDT16ZS) 6-in-1 Diesel Fuel Additive – Treats 400 Gallons, Diesel Injector Cleaner, Diesel Fuel System Cleaner, Diesel Additive Boosts Cetane, 16oz
Keep your diesel engine running smoothly with Hot Shot’s Secret Everyday Diesel Treatment. It’s a simple 6-in-1 additive that works every day. Just add it during fuel fill-ups to protect and improve your vehicle.
This product boosts fuel economy by increasing cetane levels and helps your engine run better. It also cleans fuel injectors and keeps the system free from rust and corrosion.
Using just 1 or 2 ounces per 25 gallons of diesel makes your engine last longer. Powered by science, this additive is designed for reliable, easy use and better performance.
| Pros | Cons |
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Perfect For:
This Hot Shot’s Secret Everyday Diesel Treatment is perfect for diesel vehicle owners who want to keep their engines running smoothly and efficiently. It’s a simple solution for better fuel economy and a longer-lasting engine.
Ready to Purchase?
4. Prolube Oil Treatment – Engine Oil Additive for Gas & Diesel Engines – Reduces Wear, Noise, Vibration – Boosts Fuel Economy & Horsepower – Works on Transmissions & Differentials (1QT)
Prolube Oil Treatment is a powerful engine oil additive. It helps your engine run smoother and quieter. This product works for both gasoline and diesel engines.
With Prolube, you can reduce wear and extend your engine’s lifespan. It also helps you save on fuel costs by improving efficiency.
This oil treatment is easy to use and mixes well with all types of oils. It’s perfect for cars, trucks, SUVs, and even industrial machinery.
| Pros | Cons |
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Perfect For:
This Prolube Oil Treatment is perfect for car owners and truck drivers who want to boost their engine’s power, cut down on noise and vibrations, and save money on fuel. It’s also ideal for anyone looking to extend their engine’s life and ensure smooth, reliable performance for both gas and diesel engines.
Ready to Purchase?
5. Prolube Oil Treatment – Engine Oil Additive for Gas & Diesel Engines – Reduces Wear, Noise, Vibration – Boosts Fuel Economy & Horsepower – Works on Transmissions & Differentials (16oz)
Prolube Oil Treatment makes your engine stronger. It quiets noise and smooths vibrations. Get more power with every drive.
This treatment saves you money on gas. It helps your engine run better and last longer.
It protects all engines, gas or diesel. Prolube is easy to use and works with any oil.
| Pros | Cons |
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Perfect For:
Prolube Oil Treatment is perfect for anyone who wants to keep their engine running smoothly and save on fuel costs. Whether you drive a car, truck, SUV, or use industrial machinery, this versatile additive works for gas and diesel engines, transmissions, and differentials.
Ready to Purchase?
6. Hot Shot’s Secret Everyday Diesel Treatment 1 Gallon, 6-in-1 Diesel Additive – Injector Cleaner, Fuel System Cleaner, Fuel Additive Boosts Cetane (HSSEDT01G)
Hot Shot’s Secret Everyday Diesel Treatment is a 6-in-1 diesel additive that keeps your engine running smoothly. It cleans your fuel system, boosts engine performance, and protects against rust and corrosion. Just a small dose during each fill-up helps your diesel engine stay in top shape.
It’s easy to use. Pour 1 or 2 ounces into your tank with every fill-up. This simple step improves fuel economy, increases cetane levels, and keeps your injectors spotless.
Power your vehicle with science-backed formulas designed for durability and efficiency. Trust Hot Shot’s Secret to help your engine last longer and run better every day.
| Pros | Cons |
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Perfect For:
This diesel treatment is perfect for anyone who wants to keep their diesel engine running smoothly and save money on fuel and repairs. It’s easy to use and works great for daily drivers, truckers, or anyone with a diesel vehicle.
Ready to Purchase?
7. Opti-Lube XPD All-Season Diesel Fuel Additive – Gallon (1 Gallon (Treats 512 Gallons))
Opti-Lube XPD All-Season Diesel Fuel Additive is made for optimal lubrication. It helps your truck run better and last longer. This additive increases the lubricity of ultra-low-sulfur diesel (ULSD).
With improved fuel economy, you can save money while driving. It cleans injectors and prevents rust, keeping your engine in great shape.
| Pros | Cons |
|---|---|
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Perfect For:
Truck owners and diesel equipment operators who demand peak performance, better fuel economy, and ironclad engine protection year-round. If you rely on your rig—whether logging miles cross-country or running heavy equipment on the job—Opti-Lube XPD is engineered for you. It’s the simple, cost-effective way to guard against wear, boost power, and keep injectors clean without breaking the bank. Every gallon treated costs just pennies. Keep your engine running strong, winter or summer—no exceptions.
Ready to Purchase?
8. DIPETANE 1L Fuel Additive | Improves Fuel Economy | Reduces Emissions | Keeps DPF Clean | Works with Diesel & Gasoline Engines | Cleans Injectors, EGR Valve & Sensors | Treats Up to 52 Gallons
DIPETANE 1L Fuel Additive is your engine’s new best friend! It makes your fuel burn better and cleaner.
This additive boosts fuel economy by up to 10%, saving you money on every fill-up. It works with all engines, including diesel and gasoline. DIPETANE keeps your DPF and catalytic converters clean, extending your engine’s life.
It reduces smoke and cuts harmful emissions by up to 25%. The 1-liter bottle treats up to 52 gallons of fuel. It’s the best value for a cleaner, more efficient engine.
| Pros | Cons |
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Perfect For:
This DIPETANE 1L Fuel Additive is perfect for any driver looking to save money on fuel and keep their engine running smoothly. It’s ideal for those who want to reduce emissions and ensure their vehicle passes emission tests.
Ready to Purchase?
9. REV X Ultimate Diesel Fuel Additive (4 Pack) – Boosts Cetane, Fuel Economy, Cleans and Lubricates Fuel Injectors – 8 fl. oz. (Treats 100 Gallons)
Get peak performance from your diesel engine with REV X Ultimate Diesel Fuel Additive! This powerful 4-pack treats 100 gallons of fuel, deep cleaning injectors, turbos, tanks, pumps, lines, and valves.
Boost cetane up to 12 points and unlock lost horsepower and MPG with this potent additive. By maximizing fuel efficiency, you’ll save money and reduce emissions, too!
Run cooler, cleaner, and longer with REV X. Protects your engine from rust and corrosion. Stabilizes fuel for 12 months, keeping it fresh and trouble-free.
| Pros | Cons |
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Perfect For:
The REV X Ultimate Diesel Fuel Additive is perfect for diesel truck owners and heavy equipment operators who want to maximize their engine’s performance and fuel efficiency. This powerful additive cleans vital components, boosts horsepower, and protects against damage, ensuring your vehicle runs smoother, cleaner, and longer.
Ready to Purchase?
10. Hot Shot’s Secret Diesel Extreme 16oz, Concentrated Fuel System Cleaner, Diesel Fuel Additive, Injector Cleaner – Increases MPG & Restores Engine Performance
Hot Shot’s Secret Diesel Extreme is a powerful fuel system cleaner for diesel engines. It cleans and protects all parts of your engine and fuel system. This keeps your vehicle running smoothly and efficiently.
It boosts cetane levels by up to 7 points, improving fuel economy and power. The formula prevents rust and corrosion, ensuring long-term engine health. It also reduces DPF regenerations for a better driving experience.
Using it is simple and quick. Just add 8 oz. per 20 gallons of fuel. Apply it during fill-ups or every 6,000 miles for best results.
| Pros | Cons |
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Perfect For:
This powerful fuel system cleaner is perfect for diesel truck owners and operators who want to boost their engine’s performance and improve fuel economy. If you’re looking to keep your injectors clean, increase power, and reduce maintenance, this is the solution for you!
Ready to Purchase?
Buying Guide
Fuel economy additives can save you money and keep your engine running smoothly. They work for both gasoline and diesel engines. This guide will help you choose the best one for your vehicle.
Engaging Experience:
Imagine driving farther on less fuel, with a smoother and quieter engine. These additives clean your system, reduce wear, and boost efficiency. You’ll notice fewer trips to the pump and a happier ride.
Factors to Consider When Buying:
– Engine Type: Check if the additive works for gasoline, diesel, or both. Using the wrong type can harm your engine.
– Purpose: Decide if you need cleaning, lubrication, or fuel stabilization. Some additives do all three.
– Ease of Use: Look for simple instructions. Most just require pouring into your fuel tank.
– Treatment Ratio: Know how much additive to use per gallon of fuel. This ensures proper dosing.
– Longevity: Some additives last for thousands of miles or months. Choose one that fits your driving habits.
– Environmental Impact: Pick additives that reduce emissions and are eco-friendly.
– Brand Reputation: Trust brands with good reviews and a history of quality products.
– Cost: Compare prices and value. Some additives treat more gallons, saving you money in the long run.