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      04-27-2011, 12:54 PM   #12
Brigadier General

Drives: 2013 BMW M3 ZCP Coupe
Join Date: May 2009
Location: El Segundo, CA

iTrader: (1)

First off most racing unleaded fuel that is street legal is oxygenated and does run detergents. Also, the point of diminishing return comes into effect here as once you go past 95 octane there isn't that much more to be gained.

However, I remember PencilGeek ran straight 100 octane in his car and dyno'd and ran a 361 rwhp on a dynopack while the car ran 333rwhp with just plain jane 91 octane.

Here's the graph..

Hey PG..hope you don't mind if I used this..

I personally run a blend of 100 octane just to get me back to 93 octane and offset the piss water we get here in Cali.

2013 M3 Coupe-MR/BLK ZCP, ACM test pipes, BPM Stg2 dev. tune and Megan catback, AFE Stg2. with C/F elbow VMRV810 19x10&19X11 275/295 Mich PSS.
Previous rides: 2011 M3 Coupe-MR/Blk
2007 Porsche 997C2S Speed Yellow/Blk sport seats
2004 BMW M3 Imola/Blk