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
I tried the 85 when I was in CO. no thanks! it felt like the X had 50 less HP. I run 89 no matter what. it makes a difference, even at elevation!
