Thread: What type of octane should I use on a GTP

GTP's need to run on 91+ octane, because the supercharger and low compression motors.

So just fill with 91 or higher and call it a day.

87 will cause it to detonate if going into boost.

I've run 87 before, but that's when I drove without my S/C belt.

I'd suggest premium fuel absolutely..
The car will go into the low timing table if it detects enough KR -- Not the most optimal way to go about it but it DOES work..

These cars knock even on 93 bone stock. PM me about a tune if you insist on running regular though once you get your ride back on the road.

91 octane all day. Spend the extra $5ish per fill up for premium fuel if you wanna make your car last

Awesome for bumping 2 month old thread.

Originally Posted by txslow6

Awesome for bumping 2 month old thread.

LOL

I ran 87 on a 3.1 pulley l26 bottom with no KR. AFR in the 10s at wot just like a canned tune.

I would suggest 87 for someone who just drives their Stock car. BUT if you want to drive it hard or think its a race car you should use 92.

Originally Posted by gmpowered

LOL

I ran 87 on a 3.1 pulley l26 bottom with no KR. AFR in the 10s at wot just like a canned tune.

I would suggest 87 for someone who just drives their Stock car. BUT if you want to drive it hard or think its a race car you should use 92.

Yeah, sounds like a great idea.

85 octane.































































At 14,000ft altitude.

3 extra bucks per fuel up, cant ever hurt the bank.

$4-7

91octane or higher. ALWAYS!

Racegas foo

Originally Posted by Nixon

$4-7

3-5,

unless you buy 91+ thats almost .50 more per gallon.

$.30-50c/gal more on a 15gal fillup is $4.50-$7.50

Wanna know something?

Texas is gay.

Everywhere else its .20 to .30 more for 91+, you'd out of your mind to buy gas thats .50 more 91+. and running your tank that low is going to kill the fuel pump faster.

Lol i usually filled up @ 13-14gal mark. -- the point is still the same.

My $.30c for 93oct > Your $.20c for 91oct

I used to always see a price for regular, +.$10 for midgrade, +.$10 for premium. Now it's always marked way higher.

Sam's club around here often has 93 for .30 more opposed to other stations being more, so I normally buy gas there.