GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat
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GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat (https://www.gmforum.com/)
-   1992-1999 (https://www.gmforum.com/1992-1999-91/)
-   -   Knock Return questions.. 93 SSE (https://www.gmforum.com/1992-1999-91/knock-return-questions-93-sse-239440/)

J Wikoff 07-19-2006 07:26 PM
Originally Posted by MooseGundr
it's about 25% 87 and 25% 91octane right now, i'm going to fill it up each day for a couple days to bring it up
So what is the other 50%? You'll see the biggest difference all at once if you let the tank get pretty empty, then fill it with premium.


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