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octane rateing

556 Views 0 Replies 1 Participant Last post by  barry putnam
I have recently bought a 1995 s320v. I notice the manual calls for 91 octane fuel, claiming any less will damage the catalitic converter. It is not a major problem as I didn't buy this car to save money. I am curious however if 91 octane is realy necessary.[:)]
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