Myths & Experiments
The what-if tests: fuel substitutes, oil myths, and shop-legend experiments settled with data.
Category leaderboard
Brands that won the most head-to-head tests in this category.
- 1Reduced speed plus increased tire pressure1 win
- 2Sweet crude oil1 win
- 3BestLine1 win
- 4ABS plastic1 win
- 5Walnut1 win
What actually won in myths & experiments
Products named as the winner by the independent tests indexed on this page. We have not tested anything ourselves.
Reduced speed plus increased tire pressure no product purchased, driving technique
Won: Which Fuel Saving Devices Brand Wins?
Sweet crude oil
Won: Which Crude Oil As Diesel Engine Fuel Brand Wins?
BestLine
Won: Which Shampoo As Engine Oil Substitute Brand Wins?
ABS plastic 3D printed cylinder head, 12.7 ounces
Won: Which 3d Printed Cylinder Head Material Brand Wins?
Walnut
Won: Which Wood Cylinder Head Brand Wins?
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All myths & experiments tests
Which Fuel Saving Devices Brand Wins?
Reduced speed plus increased tire pressure
See the results
Which Diesel Fuel Alternative Brand Wins?
5 products tested
See the results
Which Turpentine As Engine Fuel Additive Brand Wins?
2 products tested
See the results
Emergency Gasoline Substitutes: The Test Results
1 products tested
See the results
Nitrous Oxide Bicycle Engine Kit: The Test Results
1 products tested
See the results
Which Engine Oil Substitute Myth Test Brand Wins?
3 products tested
See the results
Which Bicycle Engine Kit Brand Wins?
2-stroke bike engine kit
See the results
Which Crude Oil As Diesel Engine Fuel Brand Wins?
Sweet crude oil
See the results
Which Shampoo As Engine Oil Substitute Brand Wins?
BestLine
See the results
Which 3d Printed Cylinder Head Material Brand Wins?
ABS plastic cylinder head
See the results
Which Crude Oil As Gasoline Substitute Brand Wins?
3 products tested
See the results
Which Wood Cylinder Head Brand Wins?
Walnut
See the results
Engine Oil Substitutes: The Test Results
1 products tested
See the results
Kerosene As Emergency Engine Fuel: The Test Results
1 products tested
See the results
Which Motor Oil Substitutes Brand Wins?
2 products tested
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Engine Fuel Substitute: The Test Results
1 products tested
See the results
2-cycle Premix Fuel Run In A 4-cycle Engine: The Test Results
1 products tested
See the results
Gas Vapor Fuel Economy Device: The Test Results
1 products tested
See the results
Which Mothballs In Fuel Brand Wins?
2 products tested
See the results
Engine Lubrication Failure: The Test Results
0 products tested
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Fuel Contamination Myths: The Test Results
1 products tested
See the results