Top 10 Best gasoline extreme in 2026

Last Updated - 6/11/2026

🏆Best Choice

Hot Shot's Secret

Hot Shot's Secret Diesel Extreme, 1 Qt (Packaging May Vary) (P040432Z)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•CLEANS FUEL STYSTEM: Hot Shot’s Secret Diesel Extreme is designed to thoroughly clean, lubricate, and safeguard all components of your engine & fuel system, such as valves, pumps, rings, pistons, and upper cylinders.
•CLEANS FUEL INJECTORS: Designed to eliminate & prevent the buildup of Internal Diesel Injector Deposits (IDIDs), External Diesel Injector Deposits (EDID's), as well as other stubborn varnish and deposits, this will keep your engine running smoothly.
•BOOSTS CETANE: Increases cetane (up to 7 points), for a more efficient combustion process, improved fuel economy, & increased engine power. It also helps reduce the frequency of DPF regenerations, ensuring a smoother driving experience.
•FIXES ISSUES: Non-alcohol-based water dispersant, fortified with military-grade rust and corrosion inhibitors, stabilizes & prevents rust, effectively dispersing moisture, this product ensures to improve overall engine performance.
•EASY TO USE: With a simple application of 8 oz. for every 20 gallons, this product is easy to use! Just pour it into your fuel tank during your next fill up or every 6,000 miles
•POWERED BY SCIENCE: Our products are engineered to resolve issues, make equipment last longer and improve efficiency. Nothing leaves our building with our name on it unless we know it is absolutely the BEST it can be.

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$18.97

$23.99

-21%

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Liqui Moly

Liqui Moly 2030 Pro-Line Gasoline System Cleaner, 500 ml, 16.91 Fl Oz (Pack of 1)

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Package Dimension : 2.24 " L x 2.24 " W x 7.96 " H
•Country of Origin: GERMANY
•Model Number : 2030
•Item Package Weight : 0.9 pounds

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$19.99

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Hot Shot's Secret

Hot Shot's Secret LX4 Lubricity Extreme 1 Gallon, Fuel Treatment for All Engines, Gasoline & Diesel Additive, Fuel Additive Increases Lubricity, Protects & Extends Fuel System Life

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Adds Protection – Increases fuel lubricity by up to 56% for an added layer of protection that keeps fuel pumps and injectors from unnecessary damage or failure, and adds lubricity back to Ultra Low Sulfur Diesel (USLD)
•No Harmful Ingredients – LX4 is formulated without harmful solvents or alcohol making it a safe and effective fuel treatment for all systems and engines
•Extends Fuel System Life – Protects any fuel system from harsh ethanol or diesel fuels and maintains a smoothly working engine and fuel system, keeping it healthy for even longer
•Lubricates Upper Cylinder – Works with any gasoline, ethanol, or diesel fuel to lubricate and protect the upper cylinder and other key engine and fuel system components
•Versatile – Perfect for gasoline or diesel engines, LX4 can also be used with fuel stabilizers and fuel system treatments to keep your vehicle at peak performance

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$74.47

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Hot Shot's Secret

Hot Shot's Secret Original Stiction Eliminator 32 Fluid Ounce Bottle

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Improved Power, Improved Compression
•Removed Engine Deposits, Seals Rings Better
•Neutralized Harmful Engine Acids, Reduced Frictional Drag
•Prevent Excessive Wear
•Reduced Lifter and Valve Noise

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$31.43

$34.95

-10%

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Hot Shot's Secret

‎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

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•CLEANS FUEL SYSTEM: Hot Shot’s Secret Gasoline Extreme is designed to thoroughly clean, lubricate, and safeguard all components of a gasoline engine & fuel system, such as valves, pumps, injectors, rings, pistons, and upper cylinders.
•BOOSTS FUEL ECONOMY: By thoroughly cleaning the fuel system, this fuel additive boosts MPG up to 7.9%, ensures combustion efficiency, & engine power, resulting in a smoother & more efficient driving experience.
•FIXES ISSUES: This fuel treatment addresses common issues associated with rough-running engines in a single treatment. Designed to improve fuel economy, smooth out idling, & unclog fuel injectors, this will have your engine running great again!
•RESTORES PERFORMANCE: High-performance cleaner that utilizes P.E.A. technology to deeply clean & restore engine power, dissolve gum & varnish buildup, removes deposits from the combustion chamber, resulting in improved overall engine performance.
•EASY TO USE: With a simple application of 12 oz. for every 20 gallons of gasoline, this product is easy to use! Just pour it into your fuel tank during your next fill up or every 10,000 miles
•POWERED BY SCIENCE: Our products are engineered to resolve issues, make equipment last longer and improve efficiency. Nothing leaves our building with our name on it unless we know it is absolutely the BEST it can be.

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$15.61

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Hot Shot's Secret

Hot Shot's Secret Gasoline Extreme 32 Oz, Concentrated Fuel System Cleaner, Fuel Additive for Gasoline Engines, Injector Cleaner - Increases MPG & Restores Engine Performance

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•CLEANS FUEL SYSTEM: Hot Shot’s Secret Gasoline Extreme is designed to thoroughly clean, lubricate, and safeguard all components of a gasoline engine & fuel system, such as valves, pumps, injectors, rings, pistons, and upper cylinders.
•BOOSTS FUEL ECONOMY: By thoroughly cleaning the fuel system, this fuel additive boosts MPG up to 7.9%, ensures combustion efficiency, & engine power, resulting in a smoother & more efficient driving experience.
•FIXES ISSUES: This fuel treatment addresses common issues associated with rough-running engines in a single treatment. Designed to improve fuel economy, smooth out idling, & unclog fuel injectors, this will have your engine running great again!
•RESTORES PERFORMANCE: High-performance cleaner that utilizes P.E.A. technology to deeply clean & restore engine power, dissolve gum & varnish buildup, removes deposits from the combustion chamber, resulting in improved overall engine performance.
•EASY TO USE: With a simple application of 12 oz. for every 20 gallons of gasoline, this product is easy to use! Just pour it into your fuel tank during your next fill up or every 10,000 miles
•POWERED BY SCIENCE: Our products are engineered to resolve issues, make equipment last longer and improve efficiency. Nothing leaves our building with our name on it unless we know it is absolutely the BEST it can be.

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$33.01

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Heet

HEET Water Remover & Premium Gas Line Antifreeze, Removes Water from Fuel System, Prevents Gas-line Freezing, Winter Fuel Additive for Fast Cold Weather Starts, 12 fl. oz.

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•HIGHLY EFFICIENT FILTERING & WATER SEPARATION: Keep your fuel line clean and free of water with the best selling brand of gas-line antifreeze and water remover
•PREVENTS RUST & CORROSION: By absorbing excess moisture, HEET helps keep the fuel system dry, reducing the risk of rust & corrosion. This ensures smoother engine operation, longer-lasting performance, & protection.
•SAFE FOR: All 4-cycle engines including fuel injected engines.
•HEET QUALITY: The health of your cars & outdoor equipment depends on the quality of your gas-line anti-freeze. With HEET products pumping through your engine’s veins, you’ll always be safeguarded against freeze-ups in winter.

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$2.08

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STP

STP Ultra 5 In 1 Fuel System Cleaner and Stabilizer, Deep Cleans Fuel System and Fights Engine Friction, 12 FlOz

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•One 12 oz bottle of STP (R) Ultra 5 in 1 Fuel System Cleaner deep cleans entire fuel system
•Features a blend of PEA and PIBA detergents to help remove harmful deposits and fight engine friction in any gasoline engine
•3x the amount of cleaning agents compared to the leading premium gasoline (1)
•STP (R) Ultra 5 in 1 Fuel System Cleaner helps you save gas by keeping your vehicle's fuel intake system clean
•Pour the entire bottle of fuel treatment into a vehicle gas tank that is at least half full
•Use STP (R) fuel additive every 4,000 miles for best vehicle performance
•Treat Rate: 12 FL. oz. bottle treats up to 35 gallons of gasoline

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$15.59

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Hot Shot's Secret

Hot Shot's Secret Big Gasser Duo - Stiction Eliminator (32 Oz) and Gasoline Extreme (12 Oz)

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•Stiction Eliminator - Restores lost engine power and compression by removing sludge and varnish deposits from engine components, and neutralizing harmful acids that cause corrosion
•Stiction Eliminator - Adds lubricity to decrease friction and reduce scoring and engine wear by up to 62%, to keep your engine healthy and at peak performance
•Stiction Eliminator - Contains a carbon nano lubricant that cleans and protects engine components including turbo injectors, rings, oil pump, pistons, HEUI injectors, and more
•Gasoline Extreme - Deeply cleans, lubricates, and protects any gasoline fuel system and engine including valves, pumps, injectors, rings, pistons, and upper cylinders
•Gasoline Extreme - Boosts MPG by up to 7.9% after the fuel system is fully cleaned by providing an effective boost in combustion, fuel economy, and engine power
•Gasoline Extreme - Acts as an engine flush to restore engine power while also working to dissolve gum and varnish, and remove combustion chamber deposits

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$47.10

$50.94

-8%

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Hot Shot's Secret

Hot Shot's Secret Gasoline Extreme 16 Ounce Bottle

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•INCREASES FUEL ECONOMY BY 7.9% (verified by 3rd party testing)
•STABILIZES ETHANOL, SMOOTHS IDLE, DISSOLVES GUMS & VARNISH
•RESTORES PERFORMANCE, POWER & FUEL MILEAGE
•REMOVES COMBUSTION CHAMBER DEPOSITS
•LUBRICATES & CLEANS: VALVES, PUMPS, INJECTORS, RINGS, PISTONS, & UPPER CYLINDERS

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$259.39

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