I have questions about the Economy (86 octane) Plus (89 octane) and Premium (92, 93, 94 grade octane) gasolines. I know Premium is allegedly required in some cars; some, Plus is ok. Most are fine on 87, and in the Western states there is 86 grade. Can anyone tell me any scenarios where 86 is ok, why, or where Plus or Premium would be required?
I have heard plenty people say that anything higher than 87 is a waste, in almost any circumstance.
I have heard plenty people say that anything higher than 87 is a waste, in almost any circumstance.