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To me, this whole octane debate is simple... burn the lowest octane fuel you can that does not result in knocking. There is absolutely no other reason to spend money on higher octane... no increase in performance (unless knocking is robbing power), no added cleaning abilities... nothing.
However, I've never known of a vehicle, which was rated to run on 87, that wouldn't without problems; that is, unless there was something wrong. There could be manufacturing flaws that introduce hot spots that could make it nearly impossible to fix without major work, otherwise, if the problems are fixed, it should run on 87.
Again, if it does run fine, there's no point in wasting your money. I certainly don't.
'01 Chevrolet Silverado Z71 ECSB
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