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85 octane rating = regular??

ak

Legendary Member
Joined
17 April 2000
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2,787
Location
Northern VA
I was in Denver this past weekend and I noticed that they advertise 85 octane gas as regular :mad: :mad: Is this common in all southwest states or just in Colorado? Good thing I was driving a rental Corolla which didn't seem to care :p I'm just curious as I have not seen octane rating lower than 87 in a long long time.

:smile:
 
ak said:
I was in Denver this past weekend and I noticed that they advertise 85 octane gas as regular :mad: :mad: Is this common in all southwest states or just in Colorado? Good thing I was driving a rental Corolla which didn't seem to care :p I'm just curious as I have not seen octane rating lower than 87 in a long long time.

:smile:
We have 87,89,93,(95 at some locations) at the pumps here in good ole Mississippi. and right now its only $1.85 per gallon :biggrin:
 
It's standard operating procedure for high altitude, Utah and Wyoming are also on the 85 program, with 91 being premium, as opposed to 92/93 found in many lower altitude areas. I'm no engineer or chemist, but I believe it has to do with the higher altitude effectively lowering an engine's compression ratio. I 'm sure someone out there can give a more detailed explanation. Colorado gas sucks, btw.

Will
 
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