Thread: Race gas
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Old 03-04-2010, 01:58 PM   #14
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Join Date: Nov 2009
Location: Connecticut
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My Ride: 2005 ZHP TT Stg 1
Originally Posted by xixixi View Post
can I run higher octane fuel in my 01 330xi? like maybe a mix of 110/93 in a 50/50 ratio or maybe a less then 50/50 anyone?
If you run race gas make sure it's unleaded or it'll degrade your O2 sensors. Sunoco has 100 octane at the pump at some select locations. You won't get the benefit of a higher octane (better ignition timings = more power) until you run about a tank of it through the engine while driving aggressively so any stored knock adaptation is cleared out (unfortunately the ECU takes its time).

However be aware that, in theory, you'll get more power if you run 93 without knocking because it's less diluted than 100: there's more explosion in it.

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Last edited by McSpeed; 03-04-2010 at 02:34 PM.
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