My oil light came n I change the oil and the filterbut light still on what to do?

If it only happens when your accelerating that would be spark knock. Your going to a higher octane fuel should have made a difference and stopped it. I'd have the timing set to factory spec, they would have to have taken the distributor out to replace the cam and I think they have it to far advanced.

You could loosen the distributor yourself and move it just a little in the direction that reduces the RPM that will retard the timing but only a small amount will be needed.

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