Octane Question - Page 2 - 6SpeedOnline - Porsche Forum and Luxury Car Resource

Mar 29, 2009 | 11:47 AM

#16

MTheory

Registered User

Joined: Jan 2009

Posts: 260

From: Las Vegas

Rep Power: 35

Quote:

Originally Posted by ttboost

ONLY if your pump gas tune is too aggressive and it is retarding timing. Most people "mix" a little fuel in with their pump gas just eliminate the POSSIBILTY of detonation on maybe a hot day or a heat soaked engine.

+1
My UMW setup gives me a 91 octane file as well as a 100 octane file. My original concern was that the 100 I was running might not actually be 100 octane due to age or false advertising. I investigated with an email to the director of operations for the service stations as well as face to face conversations with more than one fuel delivery driver. The delivery guys said the 100 octane was actually pretty popular and didn't sit in the ground too long. So far so good.