What fuel do you use?
8-2=6
Joined: Dec 2005
Posts: 3,196
From: Houston,TX
That's not smart since our cars aren't designed for it. Hope you didn't corrode anything since E85 requires it's own tune and stainless steel fuel components.
As for me, 87 since that's what Ford says. 89 if I know I'm going to do some beating but that's it. 91/93 is pointless unless you engine is tune for it.
As for brand, Exxon/Mobil, BP/Amaco (Ford recommended), Valero, and Shell are the best. Getty is junk, haven't used Lukoil but gf says it's good, Sunoco is great but dirty, and Citgo is borderline. Anything else is a mixed bag.
As for me, 87 since that's what Ford says. 89 if I know I'm going to do some beating but that's it. 91/93 is pointless unless you engine is tune for it.
As for brand, Exxon/Mobil, BP/Amaco (Ford recommended), Valero, and Shell are the best. Getty is junk, haven't used Lukoil but gf says it's good, Sunoco is great but dirty, and Citgo is borderline. Anything else is a mixed bag.
jjtgiants
Joined: Jan 2005
Posts: 4,177
From: Dublin, CA
It cracks me up how many people think that if a stock car calls for 87 octane and you put 91 octane in the tank you'll get a performance increase.
Last edited by jjtgiants; Apr 29, 2008 at 10:57 AM.
Senior Member
Joined: Aug 2005
Posts: 466
From: NC
I will say though, that I did notice a slight increase in mpg while running premium on the stock motor, but the increase was probably offset by the increased price. Also, when I tore the motor down to do my head/cam swap, I did not find any excess buildup or anything out of the ordinary. So, will it hurt anything, not likely. Is it worth it? Probably not.
Scott
Senior Member
Joined: Jan 2005
Posts: 650
From: Iowa
darn skippy!
I use 91 because that's the highest you can get in most places in Iowa... A lot of stations have 89 is the highest.
I've got reason to get the higher octane though
Senior Member
Joined: Apr 2008
Posts: 2,107
From: Corpus Christi, Texas
damn only 91 octane, that sux man, were i am the highest is 93 octane
Junior Member
Joined: Apr 2008
Posts: 12
From: Northern California
In the May issue of Modified Mustangs Joe Dasilva says he's seen 05's, especially GTs detonate under load on 87 octane. So my next tank will be 91 octane. In the summer my Yamaha R1 will ping even on 91, so I have to be careful not to short shift it. No engine is ever going to be harmed by using too high an octane fuel. But if you don't need it you shouldn't waste the money.
Thread
Thread Starter
Forum
Replies
Last Post
venom
The Reference Section
1
Jul 26, 2010 07:25 AM
