I've always been faithful to my LS and put the 93 octane. Learned my lesson when I did'nt cause it ran like a wet dog. I thought my rattling knocking engine noise was from the low octane. I still have the problem, can't figure out what it is. It doesn't happen at startup, only when the cars been running a little while and only when I press on the gas from a complete stop. Anyone know what thid could be?
Learned lesson. but...
- Thread starter rrrick
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