JCL--thanks for the info. Just realized tonight that I have been filling up on 93 (or 100 RON if we're cruising around Geneva). There is an 18-pump high volume Hess station I frequent, so I am guessing all the gas is pretty fresh. You are suggesting go with 91? I only fill up about once every 10 days, so cost is a non-issue, but you make a pretty strong case that is still, effectively, a waste of money. Ditto with the 325ci? Better not be a test on all this...

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