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 ...
When you drive I-15 thru Utah, you will notice regular is 87 octane in St. George (elevation about 2K') and it is 85 octane in SLC (elevation about 4.2K'). Every vehicle I have owned since 1980 has not had a problem with the fuel.