87 octane tune in high elevation
Former Sponsor
Joined: Mar 1998
Posts: 13,385
Likes: 4
From: Virginia
Yeah, you run in to that at high elevation - usually in those areas out west way up in the mountains, you find that at the highest altitudes 85 octane is "regular."
As long as it's a good quality fuel, that usually works with the 87 octane tuning, but if the truck pings, then it's low-grade crappola fuel and you'll have to step up to a better quality fuel. Just steer clear of the "cheap" gas, no off-brands or no-names - use only the best fuels, and you'll get better power and performance with our tuning, as well as better fuel mileage, too.
As long as it's a good quality fuel, that usually works with the 87 octane tuning, but if the truck pings, then it's low-grade crappola fuel and you'll have to step up to a better quality fuel. Just steer clear of the "cheap" gas, no off-brands or no-names - use only the best fuels, and you'll get better power and performance with our tuning, as well as better fuel mileage, too.
Senior Member
Joined: Dec 2004
Posts: 1,275
Likes: 0
From: Soldotna Alaska
Live in Denver too (SE Aurora), sucks for that extra 10 cents a gallon, Don't have a tuner yet but will in about 6 months. I'm actually getting slightly better mileage with 85 octane than I did with mid-grade but don't know how it affects tuned engines, might call Mike Troyer.