purebliss

I have used 94! I have seen 100 octane but I didn't have a gs then so I didn't get it. However when I went back with my gs they didn't sell it anymore. It was so werid it was at a staion in south jersey. Maybe they had it for boats because it was near the shore. Has anyone ever used 100 octane before in there gs? Has anyone ever tryed to octane boosters mixes?

Gstt

ran 110 octane, 15.1 at 94mph.
****ty as hell
+ SRT Lv.2

power3dfx

ive personally tried one of those octane boosters from Pep Boys. When the gs4 had little gas left(gas light was on), i poured in a small amount of the booster. this probably gave a octane of 95 or higher. noticed a bit of difference in performance, more torque at 3500 rpm. After that, i read about all the problems that can occur from running high octane, so no more of that stuff!

roenick7

104 VP Racing unleaded is the highest unlead octain that I know of. Unless you go leaded. Good thing about racing fuel is that your plugs will be cleaner than with the octain booster sold at the stores. they turn them a copper color and it makes them harder to read.
I used the 104 with NOS and ran 13.30 @ 107mph with 19"wheels.

$4-5.00 per gallon:eek:

Good luck.

PS The only reason I ran 104 was for the NOS and pinging.

lspower

i just tried 109 octane i cant really tell a differnce yet
i hope its not bad for my car i by accident put 17 gallons in......i dont know what i was thinking not to metion 85 *********** dollars later

Letsride

94 for me

mooretorque

Here's a succinct explanation of octane, what it is, what it means, and how it's formulated.

http://www.geocities.com/runyardj/OctaneExplanation.htm

PhantomZX

There's no good reason to run higher octane or octane booster unless your car is suffering from detonation. You're just wasting money.

Higher octane does not equal more horsepower - higher octane means the gasoline is less prone to ignition. You will not gain power from using higher octane unless you are first of all losing power through detonation.

Carpe Diem

All cars suffer(?) from detonation. That's what its called when the spark ignites the gasoline vapor. The term you're looking for is pre-ignition (also loosely called knocking).

George

SeattleGS400

iTrader: (1)

I did some reading a while back on high octane gas, and for those that put in very high octane gas (i.e. 100+ octane from a pump), if you tried, I hope that you used the unleaded type. A lot of jet fuel that has high octane is leaded, and it will kill your catalytic converter within a tankful of use!

PhantomZX

I surely hope our cars don't suffer from detonation!

http://www.clementsracing.com/Techcenter.ivnu

Both detonation and preignition are bad, but by preignition is caused mainly by hot spots in the combustion chamber, not by the low octane gasoline.