Quote:
Originally posted by Ken99287
i am glad to get this conversation going again though because with gas prices so high, i don't want people paying extra and not getting anything out of it. now if it actually helps(higher compression vehicles, forced induction, etc), go for it! i used high octane with iso in my saab because it really boosted performance. It just bothers me that some people think that even though their car calls for low or mid grade, that somehow high grade will give them better results. that's like, being tricked by the gas companies! i mean, they charge us enough already, we don't have to fall into their, do you want "Low" grade or "Performance/Ultra/Premium" trap.
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It's not an issue of boosting performance, it's a matter of what is required to keep the engine from detonating. Like I said before in my pervious post, using a higher octane gas than what is required will cause an excessive amount of byproducts to be formed after combustion.... leading to carbon buildup and dead converter.
When i had my old '65 Impala i had no choice but to use 92 or 93. Anything less and it would ping. Jumping up to race gas would do nothing for it. In theory, and actual use.