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Sunoco ultra 93 question
Total new be here I've only driven my new to me ZL1 56 miles so far.
Sunoco ultra 93 non ethanol gasoline has been recommended to me. When I went to fill up the sign on the pumps say ultra 93 but the selection button said minimum octane 90. So is this really 93 octane appears I may be running 90. Or am I just paranoid
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