Quote:
Originally posted by Kisner
I'm confused (as usual). What fuel should I be running in my 68 coupe, 302 4V? Right now I'm running 93 octane unleaded.
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The lowest octane you can, without pinging.
Try putting in half a tank of 89 next time, and see if it pings. If it does, go up, if it doesn't, go down.