100 Octane In 2004 GT
11-05-2009, 01:02 PM
#11
5th Gear Member
Join Date: Aug 2007
Location:
Posts: 3,189
Everything that I've read on this subject says that no harm will come to either the engine or the exhaust system. However, even though it won't hurt, it won't benefit the car either; unless there's knock. What I do know, is that I'm quite a bit faster when drag racing (legally) with 91 octane than I am when using 87 octane. I don't have a tune, it's stock.
what is done to your car first off.
but to sum it up, waste your money on 100 octane if you want, let everyone know the results since you have been warned.
11-06-2009, 05:04 PM
#14
2nd Gear Member
Join Date: Mar 2003
Location: United States
Posts: 396
Upping the octane will allow you to get more aggressive with timing, which will give you more power. But simply upping the octane without advancing timing, will not help. every one is correct, that without a tune change, it won't make any diff.
Thread
Thread Starter
Forum
Replies
Last Post
jwog666
Pipes, Boost & Juice
11
12-27-2021 08:09 PM
lincolnshibuya
V6 (1994-2004) Mustangs
9
12-08-2015 04:37 PM
breaking
Audio/Visual Electronics
5
10-02-2015 01:27 PM
