85 octane
While traveling out west this summer I noticed most of the gas stations offering 85 octane and 87 octane as their mid grade. Has anyone tried this in their gasser? I wasn't going to try it especially ...
Forum Discussion
At a certain point in elevation (and I do not know what it is) they sell lower octane fuel they say it has to do with the elevation and that it is not required or better said it is not needed for the benefit of the higher octane. I have bought vehicles here and while the owners manual will state use 87 or whatever and have had dealers tell me just use 85 or whatever the next lowest grade is compared to what is in the manual. Here you typically see 85,87,89 octane instead of the 87,89,91 that I see at lower elevations. I've been in Colorado for several decades and it has been this way for as long as I have been here. If I recall the benefit of higher octane is to help prevent pre detonation but apparently the lower density of the air (ie oxygen) at elevation provides the same benefit so they don't go to the extra cost of production for the higher octane ratings.
I think, maybe
I think, maybe
