Last time I drove back all I could find was 91 octane at a local Shell. There's gotta be better petrol somewhere close I'm hoping. Coming up from sea level the t-lag is bad enough without making it worse with lower octane gas :mad:

91 is as good as it gets here, unless you want to run race fuel.

91 is as good as it gets here, unless you want to run race fuel.
Flavin! 93 is on every corner around here :confused: Oh well. Anytime back in Denver is still vastly superior to the same spent... errr... down here ;)

Thanks for the feedback though :)

i think theres 100 octane at the pump on belleview and i 15

I believe if you look around on awdpirates there is a list of high octane places.

I used to know where most of the places were, there are about 10-15 places you can get 93-104 from a pump station.

with the altitude though 91 is as good as it gets in general...

with the altitude though 91 is as good as it gets in general...
I guess I'm not quite digesting this point. How does altitude directly correlate with the available octane? BTW not meant as a challenge, just meant as a simple question as I always enjoy re-education :)

I coulda swore I could get 93 last time I was in CO with my Subie

I guess I'm not quite digesting this point. How does altitude directly correlate with the available octane? BTW not meant as a challenge, just meant as a simple question as I always enjoy re-education :)

The reason for higher octane is to prevent Detonation or pinging. This occurs when there is unburnt fuel left in the chamber. Usually from low octane gas and higher o2 amounts. With a lower o2 amount at a higher altitude you do not need a higher octane. As was explained to me by Bill Breedlove.

The reason for higher octane is to prevent Detonation or pinging. This occurs when there is unburnt fuel left in the chamber. Usually from low octane gas and higher o2 amounts. With a lower o2 amount at a higher altitude you do not need a higher octane. As was explained to me by Bill Breedlove.




Yep....

More or less less air in the air available means needing less air in the fuel..

Becomes less of a valid point with forced induction but that is the basis of the thinking that leads to us getting 85/87/91 (I've seen 83 and as low as 81 in some part of the mountains!)

Why not put a couple gallons of E85 in for a little octane boost. Its cheap 1.99 at broadway and alameda

Thanks for the explanation and input :) However, with all the snow around here the concern with engine performance is pretty low. Heck with "all season radials" at the 4 corners, I've got my hands full just trying to maintain traction with conservative throttle input. Slow, safe and slide free is all I'm gunning for right now :cool:

Petrostop on Parker Road south of I225 has 93 octane at a good price.

Superg