Join Date: Feb 2009
Location: Sweet Home Alabama
I know nothing about SLC.
Minimum octane is 87 and I run that on the road (with 87 tune) when traveling and is OK per owners manual. Some people tend to think that premium is required but it is not per GM.
As i understand it, in higher elevations, 85 is available and works the same as 87 in lower elevations. Running 85 while in Utah or colorado springs is fine but if you are just traveling through, 87 would be better as once you are lower in elevation, you may experience pinging or knocking. I lived in Colo Springs for a few years and 85 is standard gas and 93 is almost completely unavailable as 90 or 91 is premium there.
09 GT, Stryker Blue, Sport/Prem
07 Solstice GXP, Mean Yellow, tuned
03 Excursion, 6" Fab lift, V10, 37s
94 Bronco, 5.8L, 35s and rust