Take This Quiz To Find Out If You’re A Car Engine Expert!
Which is the best air/fuel ratio for a gasoline engine?

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14.7:1 is the best stochiometric AFR or air/fuel ratio for a gasoline engine for it to perform at its best. However, some people manipulate the ratio depending on how they want their vehicle to perform.
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Which is the best air/fuel ratio for a gasoline engine?
- 15.3:2
- 6.4:1
- 14.7:1
- 2:1
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