
Small Engine Fuel Sep 2017 Test: Which Brand Wins?
In our Sep 2017 test we compared 3 small engine fuel options head to head. 50/50 Gas-Diesel Mix came out on top. See the measured results, the runner-up, the budget pick, and a link to the full test video.
50/50 Gas-Diesel Mix
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The quick take
The short version of why each pick lands where it does, built straight from the measured results.
“I have to admit, I'm really impressed that the 50/50 diesel-gas mix worked.”
The measured results
Every number below is read straight from the test. Products are listed in the order they finished.
Outcome
- 1100% Diesel
not successful; the engine ran for a while, then started blowing a lot of smoke, and flooded out
- 250/50 Gas-Diesel Mix
successful; the engine ran the entire contents of the tank to completion
- 3Mothball + B12 Chemtool + Diesel Mix
did not work
All measurements (1 more)+
Composition
- 3Mothball + B12 Chemtool + Diesel Mixapproximately16 oz
of diesel, about half an ounce of B12 Chemtool, and one mothball dissolved in a small amount of acetone
- 1100% Dieselnot tested
- 250/50 Gas-Diesel Mixnot tested
How it was tested
- compression test (baseline, before diesel testing; no specific numeric result stated in the transcript)
- run-to-completion test of each fuel mixture in the same small gas engine
- side-by-side burn comparison of gasoline versus diesel poured on cardboard and ignited simultaneously
“I have to admit, I'm really impressed that the 50/50 diesel-gas mix worked.”
More Fuel & Additives

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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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