Best Fuel Economy Fluids: Save Money & Boost Car Efficiency

1. Mobil 1 Advanced Fuel Economy Full Synthetic Motor Oil 0W-20, 5 Quart

Mobil 1 Advanced Fuel Economy motor oil is a full-synthetic 0W-20 oil. It’s designed to improve fuel economy with its low-viscosity formula.

The Triple Action Formula boosts engine performance, protection, and cleanliness. It guards engine parts for up to 10,000 miles between changes. It meets ILSAC GF-6 standards for LSPI and chain wear protection.

This oil prevents harmful deposits and sludge, helping to extend engine life. It maintains viscosity and resists breakdown for lasting reliability.

2. Hot Shot’s Secret Everyday Diesel Treatment EDT 4 oz – Treats 100 Gallons – 6-in-1 Diesel Fuel Additive, Injector and Fuel System Cleaner, Boosts Cetane

Hot Shot’s Secret Everyday Diesel Treatment is a 6-in-1 diesel fuel additive. It keeps diesel engines clean and running smoothly with regular use.

This treatment boosts cetane levels by up to 7 points, improving fuel economy and engine power. It cleans fuel injectors, fights rust, and protects vital engine parts from wear.

Use 1 oz every 25 gallons of diesel. It’s easy to pour at every fill-up. One 4 oz bottle treats up to 100 gallons of fuel.

3. STAR BRITE Star Tron Enzyme Fuel Treatment – Concentrated Formula 32 Fl. Oz. – Treats up to 512 Gallons – Fuel Stabilizer & Treatment, Gasoline Stabilizer, Star Tron Marine Enzyme Fuel Treatment

Star Tron Enzyme Fuel Treatment keeps your engine running smoothly and reliably. It prevents ethanol problems like rough idling and poor performance. One bottle treats up to 512 gallons of fuel, making it cost-effective.

It works in all engines and fuels, from cars to boats. Plus, it stabilizes fuel for up to 2 years and prevents water build-up, keeping your engine clean and efficient.

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 boosts your engine’s power and cuts noise. It works for gas and diesel engines, transmissions, and differentials.

It saves fuel, extends engine life, and is easy to use. Works with synthetic and conventional oils. Perfect for cars, trucks, SUVs, and machinery.

5. ACDelco GM Original Equipment 10-9394 (88865601) Dexron VI Automatic Transmission Fluid – 1 qt

ACDelco GM Dexron VI is a top-quality transmission fluid. It works with older DEXRON systems and upgrades them.

This fluid lasts longer and handles heat better. It cuts foam, stays smooth, and keeps gears running clean. You might save fuel and avoid costly repairs.

It lets you wait longer between changes. Your transmission stays protected and strong. Use it to keep your vehicle running like new.

6. Star Tron Enzyme Fuel Treatment Concentrate – Designed to Help stabilize Gasoline and Support Ethanol Fuel Performance

Star Tron Enzyme Fuel Treatment helps engines start easily and run smoothly. It prevents ethanol problems like rough idling and poor performance. This treatment boosts fuel economy by keeping fuel systems clean.

It stops water build-up in fuel, avoiding engine trouble in wet conditions. Works on old fuel, making it last up to 2 years and restoring its quality.

Fits all engines and fuel types—cars, boats, or lawn mowers. One ounce treats 16 gallons, making it a smart, low-cost choice.

7. Bardahl DEF-Shot 3350 – The Ultimate DEF Cleaner and Anti-Crystallization Diesel Additive Reducing DEF Consumption – 5oz

Bardahl DEF-Shot 3350 is a DEF cleaner and anti-crystallization additive that cuts DEF use and keeps exhaust systems clean. Just add 1 bottle to a DEF jug before filling the tank—no fuel tank use allowed.

Eliminates deposits left by DEF. Restores optimal spray patterns for better efficiency. Reduces backpressure to boost engine power and fuel economy.

This everyday diesel treatment prevents costly repairs by keeping the DEF system clean. Use regularly to avoid breakdowns and save money long-term.

8. Performance Formula One Shot 8oz, Case of 24 Bottles Treats 30 gallons Diesel Fuel per Bottle

Performance Formula One Shot is a powerful fuel treatment for diesel engines. Each 8oz bottle treats 30 gallons of diesel fuel, making it cost-effective and easy to use.

It restores horsepower by cleaning deposits in the injection system. It also reduces fuel consumption, saving you money on every fill-up.

Improves engine performance, reduces wear, and cuts emissions. A must-have for diesel drivers.

9. DT 550 Friction Reducer 1 Gallon, 128 Oz Engine Friction Modifier – Enhances Performance, Reduces Wear & Boosts Fuel Economy | Works with Gas & Diesel Motors

DT 550 Friction Reducer cuts engine friction, lowers wear, and boosts performance. It improves fuel economy and keeps engines cooler during use. Safe for gas and diesel engines, it works with all motor oils.

This formula protects for up to 5 years or 50,002 miles. It reduces cold-start friction, adds power, and won’t void warranties.

10. HI-Gear Energy Release Antifriction Metal Conditioner 8 fl. oz. | Engine and Transmission Oil Additive, Enhanced Wear Protection

HI-Gear Energy Release boosts fuel economy and cuts heat and friction. It shields engines and transmissions with enhanced wear protection.

Use it in snowmobiles, motorcycles, ATVs, watercraft, lawn equipment. It slashes friction and heat between moving parts. Your gear runs cooler and smoother.

Optimized performance comes from reduced metal wear. It saves fuel and boosts power. Works in all gas and diesel engines.