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Octane at altitude

816 views 2 replies 3 participants last post by  Wolfpackin 
#1 ·
We all know that the specified octane rating for JKs (2015 +-) is 87. Youi can get by at lower octane, say 85, at higher altitudes. I never drive below 3,500' and wondered whether folks in similar areas routinely run 85. Locally, regular gas is rated 87 in the summer and 85 in winter, so it makes a difference only part of the year. The difference is $0.10/gal, so it's not a big deal, and I realize that Jeep may not leave room for common sense when it comes to fuel grades. Plus, nobody want to do any harm to their outfits.
 
#3 ·
I live at just under 7,000ft and do most of my driving between 7,000-9,000ft.
I use nothing but 85 octane and have no issues, and my dealership recommended using it.

I'm not sure if there is a minimum altitude for 85 octane so maybe ask your local dealership.
 
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