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> Gasoline - 90 Octane, Ethanol Free (89), or additives, How to reduce valve knock
dcecc1968
post Feb 6 2019, 07:46 AM
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We are having some Spring weather this week in Charlotte, NC (and no rain!) so I've been driving the 914 and noticed that after about 20 minutes of driving, the valves intermittently knock from "normal" to very loud for no apparent rhyme or reason.

Outside of the obvious that it may be time for a valve adjustment, I wondered what Gasoline grade folks are using.

What Petro are you using in your 914?
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