I spent the weekend in Charlotte at the Lowes auto show. Cool event we had about 20 BMWs show up for the Tarheel chapter. While I was there I came across a gas station that offered 100 octane at $4.25 / gallon. So at $65 bucks I figured why not.

Man, did that breath life into the car. It is like I have another 10-20 hp on tap. I would consider it Crack Cocain for my M - speed, but addictive. Does anyone know of a shop it ATL that I can fuel up. A couple of the guys in the Tarheel chapter, the obsessive compulsive at least, claim to fill up on 100 proof once a month and I can see why.

Food for thought.

rks

I guess I'm willing to believe it because of the software you've got. Possibly it's tuned to take advantage of the higher octane fuel and is normally having to dial things back a bit on 92. Otherwise, I'd have to default to my usual response of saying running higher octane than what your car needs is a total waste of $$.

Anyone know if the stock software in this car would know what to do with 100? My guess would be no?

Ever consider an octane improver like Pro Boost?

http://silkoleneshop.com/products/other/15250310.html

15 gallons of 100 octane @ $4.25/gal = $63.75 to get 100 octane

15 gallons of 92 octane @ $1.90/gal + half can of ProBoost to get 3% mix @ $7 = $35.50 to get ~95 octane

seems like a much cheaper alternative if you wanted a little extra daily kick and can't find 100 easily?

You live in roswell....I got somewhere for you. Go up crabapple, there is a shell station right across the street from the alpharetta court house....105 octane. I dunno about the price though

I do not remember who did the tests but they did test the stock programming on an E46 M3. The results were that the computer can take advantage of the higher octane until 96 or so. If you go higher with the stock programming it will be just a waste.

But I an tell that S54s are very sensitive to octane. Since my car is driven in the weekends only, I have a tank of gas for about a month. Gas deteriorates by sitting, so when I fuel up I can tell the difference right away.

Florian

the pro boost way might be the better way to go. i would love to know what cars require 100+ octane gas.

I was hoping for an alcohol story involving pandas :(

I was hoping for an alcohol story involving pandas :(

And thus you deliver us to our conclusion of what really goes on in your mind. :confused

I didn't pick up any power running 100 octane in my E46 M3. I ran through a tank hoping the ECU would adjust and then filled up again and took it to the drag strip. My trap speeds were exactly the same as with 93 octane ~ 106mph. Same results @ Road Atlanta.

I get mine from VP of North Atlanta. 770-926-6130. They charge 25 bucks to deliver a 54 gallon drum of any octane you want to your house.

-Clark

And thus you deliver us to our conclusion of what really goes on in your mind. :confused
:lol

who is us?

:lol

who is us?


Us...as in the members of the forum... :confused

I do not remember who did the tests but they did test the stock programming on an E46 M3. The results were that the computer can take advantage of the higher octane until 96 or so. If you go higher with the stock programming it will be just a waste.

But I an tell that S54s are very sensitive to octane. Since my car is driven in the weekends only, I have a tank of gas for about a month. Gas deteriorates by sitting, so when I fuel up I can tell the difference right away.

Florian

Amen. I knew a guy when I lived in Jax who had a Countach that swore by 98 octane gas. Usually it ran like crap on 93 octane (the car is actually a really piece of junk in terms of build quality, inside and out). All it did was keep the knock down in that high compression motor. It does not add horsepower.