I know some cars require Premium Fuel only, while some recommend unleaded only.
It has to do with compression/air combo but what is the HP reduction for each grade difference?
My car says to use Premium Only, If i use Premium it will get it's maximum performance, If i use a 89 octane how much power loss will I miss, as well as using (Regular) 87 octane how much power will be lost?
Reason I ask, is that since Premium gas is always higher I tend to use the cheapest (regular 87 octane). A Honda "Accord" was quicker than my car today and I can't believe it. It could have been due to my shifting or maybe the fuel issue.
A Honda Accord should not be able to beat my car by any means.
Anyone have a clue?