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).
Originally Posted by xixixi
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?
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.
but fondly remembered...
Technique Tuning Stage 1 Turbo w/ Greddy Profec B Spec II | 3.07 Quaife
ATI Super Damper | Vaio Oil Pump | VAC Pan Baffle | SRE Organic Clutch
Turner Reinforcements | SPC Camber Arms | Powerflex FCABs & SFBs
Turbo Driveability Video
Horsepower vs. Torque
Last edited by McSpeed; 03-04-2010 at 01:34 PM.