octane rating and engine performance
In Texas, the minimum octane rating is 87. On a recent trip to Glacier, I noticed a lot of the fuel in states like CO, WY and MT, the octane was 85, and you had to buy the mid-grade to get 87 and abov...
Forum Discussion
Coolmom is exactly correct. You don't need the higher octane in higher elevations because the elevation is limiting the amount of air that gets in your engine. (unless you are supercharged)
If OEM says use the cheap stuff at sea level then use the cheap stuff a altitude no matter what the number is.
One caveat. If it is really hot and your towing very hard at WOT for long periods "I" would jump the octane to mid grade or even premium.
If OEM says use the cheap stuff at sea level then use the cheap stuff a altitude no matter what the number is.
One caveat. If it is really hot and your towing very hard at WOT for long periods "I" would jump the octane to mid grade or even premium.
