Quote:
Originally Posted by JeepinMatt
Using a higher grade fuel than required does not improve performance. Theres no ultra simple "upgrade" like that. 92 doesn't equal "fast" it just deals with the combustion of the gasoline mixture. Using 92 in a car that requires 87 will do absolutely nothing, except maybe eventually cause some carbon build up. Don't confuse 87 with low-grade gasoline.
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I agree.....however the higher the piston compression ratio the higher octane fuel you ought to use. I know that if I use less than 97 octane in the vette there is alot of pinging going on under the hood. Granted it is not the stock motor under there and the idle may be set a little low. It just runs better on the higher octane stuff. Runs superb on 107.