Fuel & Additives
Fuel stabilizers, injector cleaners, octane boosters, and what actually happens when you pour them in.
Category leaderboard
Brands that won the most head-to-head tests in this category.
- 1Hot Shot's Secret2 wins
- 2Sta-Bil1 win
- 3Honda1 win
- 491 octane no ethanol gasoline1 win
- 5Unleaded gasoline1 win
- 6Hy-Vee1 win
What actually won in fuel & additives
Products named as the winner by the independent tests indexed on this page. We have not tested anything ourselves.
Sta-Bil
Won: Which Fuel Stabilizer (plus A Separate 1-year Headlight Restoration Kit Durability Check-in) Brand Wins?
Hot Shot's Secret
Won: Which Diesel Anti Gel Fuel Additive Brand Wins?
Honda GX200
Won: Which Small Gas Engine Brand Wins?
91 octane no ethanol gasoline
Won: Engine Fuel 2020 Test: Which Brand Wins?
Hot Shot's Secret Diesel Winter Anti-Gel Additive
Won: Which Diesel Fuel Additive Brand Wins?
Unleaded gasoline
Won: Engine Fuel Aug 2019 Test: Which Brand Wins?
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All fuel & additives tests
Which Fuel Stabilizer (plus A Separate 1-year Headlight Restoration Kit Durability Check-in) Brand Wins?
Sta-Bil
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Which Diesel Anti Gel Fuel Additive Brand Wins?
Hot Shot's Secret
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Which Gasoline Octane Grade Brand Wins?
87 Octane
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Which Small Gas Engine Brand Wins?
Honda GX200
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Engine Fuel 2020 Test: Which Brand Wins?
91 octane no ethanol gasoline
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Which Diesel Fuel Additive Brand Wins?
Hot Shot's Secret Diesel Winter Anti-Gel Additive
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Fuel Stabilizer: The Test Results
1 products tested
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Engine Fuel Aug 2019 Test: Which Brand Wins?
Unleaded gasoline
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Engine Fuel Jun 2019 Test: Which Brand Wins?
2 products tested
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Which Fuel Additive Brand Wins?
3 products tested
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Which Gasoline (ethanol Vs Non-ethanol) Brand Wins?
Hy-Vee non-ethanol 91 octane gasoline
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Which Fuel Water Remover Brand Wins?
3 products tested
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Engine Fuel Oct 2018 Test: Which Brand Wins?
Regular gasoline
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Which Premium Vs Regular Gasoline (fuel Additive/detergent Claims) Brand Wins?
2 products tested
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Engine Fuel: The Test Results
1 products tested
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Which Fuel/engine Additive Brand Wins?
3 products tested
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Engine Carbon Cleaner: The Test Results
1 products tested
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Engine Fuel Jan 2018 Test: Which Brand Wins?
Gasoline
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Which Fuel And Carburetor Cleaner Additive Brand Wins?
2 products tested
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Small Engine Fuel Dec 2017 Test: Which Brand Wins?
2 products tested
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Small Engine Fuel: The Test Results
1 products tested
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Small Engine Fuel Sep 2017 Test: Which Brand Wins?
50/50 Gas-Diesel Mix
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Small Engine: The Test Results
0 products tested
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Fuel Additive: The Test Results
1 products tested
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Engine Carbon Cleaning Method: The Test Results
1 products tested
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