Hmmmmmm whats the octane of your gas????
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Mid grade is a blend of the 2. Another dirty little secret is that if your car is not high compression (such as in a performance of turbocharged engine) you might have less performance and mileage with higher octane gas. Octane rating is the fuel's resistance to detonation.
Ah!!! Thanks. I new it was in the controller
Hi and mid grade gas is typically not optimal for most vehicles. If your engine is not tuned for it, you will get less power and lower gas mileage
Good life pro tip