Thread: What did you do to / for your E53 today??
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Old 05-03-2026, 11:19 PM
Fifty150hs Fifty150hs is offline
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Quote:
Originally Posted by Salty B. View Post
I've run 93 octane in this thing since I bought it.

Last fill was 87 at about 1/4 full. It does not seem to run any worse. No knocking.

What grade US fuel do y'all run? I get gas at Costco, and a few times when it was near E I did half 93 and half 87. Ran fine. So I've probably been setting money on fire with the 93.
I buy my gas at Costco. Its much cheaper than the other stations around her. Highest octane here is 91 most everywhere. You can find 93 at a few stations. They call it "race gas".
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