View Single Post
Old 12-24-2013, 03:17 PM   #22
6th Gear Member
SamE30e's Avatar
Join Date: Jul 2007
Location: Milton
Posts: 2,913
Fuel is a major contributor. Whatever is advertised, could be on a better fuel in lower ambient temps on a less humid day. Even the ethanol content or water content in the tank is huge.

The difference between 91 octane and 94 octane is pretty big. My car made 15% more HP of 94 than when I tuned it on 91.
85 325 - Turbo M52B28.
SamE30e is offline   Reply With Quote