25 tests
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
All fuel & additives tests
Fuel & Additives2025
Which Fuel Stabilizer (plus A Separate 1-year Headlight Restoration Kit Durability Check-in) Brand Wins?
Sta-Bil
See the resultsFuel & Additives2025
Which Diesel Anti Gel Fuel Additive Brand Wins?
Hot Shot's Secret
See the resultsFuel & Additives2023
Which Gasoline Octane Grade Brand Wins?
87 Octane
See the resultsFuel & Additives2023
Which Small Gas Engine Brand Wins?
Honda GX200
See the resultsFuel & Additives2020
Which Engine Fuel Brand Wins?
91 octane no ethanol gasoline
See the resultsFuel & Additives2019
Which Diesel Fuel Additive Brand Wins?
Hot Shot's Secret Diesel Winter Anti-Gel Additive
See the resultsFuel & AdditivesMyth
Fuel Stabilizer: The Test Results
1 products tested
See the resultsFuel & Additives2019
Which Engine Fuel Brand Wins?
Unleaded gasoline
See the resultsFuel & Additives2019
Which Engine Fuel Brand Wins?
2 products tested
See the resultsFuel & Additives2019
Which Fuel Additive Brand Wins?
3 products tested
See the resultsFuel & Additives2019
Which Gasoline (ethanol Vs Non-ethanol) Brand Wins?
Hy-Vee non-ethanol 91 octane gasoline
See the resultsFuel & Additives2018
Which Fuel Water Remover Brand Wins?
3 products tested
See the resultsFuel & Additives2018
Which Engine Fuel Brand Wins?
Regular gasoline
See the resultsFuel & Additives2018
Which Premium Vs Regular Gasoline (fuel Additive/detergent Claims) Brand Wins?
2 products tested
See the resultsFuel & AdditivesMyth
Engine Fuel: The Test Results
1 products tested
See the resultsFuel & Additives2018
Which Fuel/engine Additive Brand Wins?
3 products tested
See the resultsFuel & AdditivesMyth
Engine Carbon Cleaner: The Test Results
1 products tested
See the resultsFuel & Additives2018
Which Engine Fuel Brand Wins?
Gasoline
See the resultsFuel & Additives2018
Which Fuel And Carburetor Cleaner Additive Brand Wins?
2 products tested
See the resultsFuel & Additives2017
Which Small Engine Fuel Brand Wins?
2 products tested
See the resultsFuel & AdditivesMyth
Small Engine Fuel: The Test Results
1 products tested
See the resultsFuel & Additives2017
Which Small Engine Fuel Brand Wins?
50/50 Gas-Diesel Mix
See the resultsFuel & AdditivesMyth
Small Engine: The Test Results
0 products tested
See the resultsFuel & AdditivesMyth
Fuel Additive: The Test Results
1 products tested
See the resultsFuel & AdditivesMyth
Engine Carbon Cleaning Method: The Test Results
1 products tested
See the resultsOther categories
Engine Oil & Fluids53Car Care & Detailing15Jump Starters & Car Power20Auto Parts & Repair16Power Tools37Power Tool Batteries7Hand Tools58Blades, Bits & Abrasives39Outdoor Power Equipment25Fasteners & Hardware7Adhesives, Glue & Tape19Shop Chemicals & Lubricants22Flashlights & Lighting6Batteries & Power Banks10Workwear & Safety Gear15Home Appliances25Home & Cleaning11Gadgets & Tech15Myths & Experiments21