It doesn't matter what you usually or even always run in it. What does the owner's manual list as the minimum octane rating? That is what you need to go on. I have never heard of 85 Octane gasoline. Are you talking about E85? If so, you can only run that if your vehicle is a flex fuel vehicle or you will do severe damage to parts of the engine. Honda may call it something other than flex fuel. GM calls it that and I don't car what Honda calls it.

The only 85 octane gas I've seen is Ethanol 85. You need a "flex fuel" model vehicle to use that stuff. Use 87 or higher.

Depends on the elevation. If you're 2000 feet up -- and in most of Idaho, you will be -- 85 is all you need.

When you get up in altitude, 85 octane is sold it will work just fine. If you're dropping back down mix in a little 91, most the stations I find traveling, have a med grade. Check your local truck stop...as you leave..

I'll guaranty you that 91 octane costs less in Idaho than in NY. Stop your whining!

won't matter

The computer controls should allow 85 octane to work alright in there.

I'm assuming you mean octane.The answer is yes it won't matter at all

It wont hurt anything. thats what i have been running in all my cars for years

I lived in Ma and I have always put 87 in my 2003 Honda Accord 2.4 4 Cyl. I just drove cross country to Idaho. They have they sell 85 in all there gas stations as unleaded, where in mass 87 is unleaded. they also sell 91 as premium. I have put 91 in my car a few times and I know it doesn't effect it in anyway. I just didn't know if I could put 85 in it without causing problems. Because they don't sell 87 out here, its either 85 or 91 and there is about a .45 cent deference. It would be nice to save the money.