How were the engine fuel options tested?

Each option was put through: ethanol content verification via water separation tester; lubrication and wear scar test using a 40 ml sample; 1 hour engine burn and carbon buildup comparison with compression checks; fuel efficiency test in a fuel injected generator under load; flame pattern comparison in a see through cylinder head engine; timed uphill drag run in the Farmabago.

Where can I watch the full test?

The complete hands-on test video is on the original creator's channel: https://www.youtube.com/watch?v=r9Hvg210ZAE

2020 test2 productsFuel & Additives

Which Engine Fuel Brand Wins?

Q: Which engine fuel brand wins?

91 octane no ethanol gasoline came out on top in a head-to-head test of 2 options. The verdict: "Engineered fuel performs about the same as 91 octane no ethanol fuel, and it definitely seems really overpriced."

We compared 2 engine fuel options head to head. 91 octane no ethanol gasoline came out on top. See the measured results, the runner-up, the budget pick, and a link to the full test video.

The verdict

Winner

91 octane no ethanol gasoline

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Runner-up

TruFuel

Price shown in test: $20 per gallon

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The measured results

Every number below is read straight from the test. Scroll sideways to see all measurements. Products are listed in the order they finished.

Product	Ethanol content verification	Lubrication and wear scar test, 40 ml sample, 30 second run	1 hour engine burn and carbon buildup test	Fuel efficiency, fuel injected generator under a 2,370W halogen light load	Flame pattern in a see through cylinder head engine	Timed uphill drag run in the Farmabago
191 octane no ethanol gasoline	confirmed no ethanol content using a water separation tester	wear scar was about 7 percent larger than TruFuel's, so TruFuel provided slightly better lubrication than this gasoline	engine ran great, left a small amount of deposits on the piston, valves, and cylinder head, less buildup than TruFuel left afterward	engine ran 22 minutes 44 seconds total, about 1 percent better fuel efficiency than TruFuel	blue flame starting over the piston, gradually becoming bright orange and yellow	58 mph
2TruFuel 4 cycle engineered fuel, TF3 performance package$20 per gallon	confirmed no ethanol content using a water separation tester, consistent with TruFuel's ethanol free claim	about 7 percent smaller wear scar than the no ethanol gasoline, providing extra lubrication as claimed	engine ran just as well as on gasoline, but left a little more buildup on the spark plug, cylinder head, and around the valves than the no ethanol gasoline	engine ran 22 minutes 22 seconds total, about 1 percent less fuel efficient than the no ethanol gasoline	flame pattern looked very similar to the no ethanol gasoline	58 mph, tied with the no ethanol gasoline on speed, though the host jokingly called it the winner of the exhaust note contest

How it was tested

ethanol content verification via water separation tester
lubrication and wear scar test using a 40 ml sample
1 hour engine burn and carbon buildup comparison with compression checks
fuel efficiency test in a fuel injected generator under load
flame pattern comparison in a see through cylinder head engine
timed uphill drag run in the Farmabago

“Engineered fuel performs about the same as 91 octane no ethanol fuel, and it definitely seems really overpriced.”
From the test video verdict.

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