Such as yourself I suppose your an expert at everything

RigRat I know you have an issue with me that's fine. Calling me "one of the twins" Saying things like "I am being called out", "I will be back I have to deal with this" Really I am fairly sure I did not call you out once.

However you "think" what I am saying is incorrect then "prove it". Don't play wording games and post FACT's that show I am incorrect.

This Topic is about Octane if you have any factual information you would like to add be my guest. As that is what I am trying to provide to the OP, As you have seen from what happened to "limited" this forum is not your personal play ground and I am sure you will be "smart" enough to hang yourself lol . There are other members who all have the same rights you do. Please respect that. Also as you posted in "YOUR" forum The "EFFTARD" has access to your side of the forum too.

"good Day" as you put it

 

The octane ratings around here are also 87, 89 and 92. I took a trip to Iowa and then Colorado last September and my truck ran fine on '85 octane fuel. At higher elevations the system automatically adjusts for the altitude and octane changes. On the 2800 mile round trip my ’10 XLT Screw with a 4.6 averaged 19.2 mpg.

 

My wife and I drove from Florida to Breckenridge and Keystone Colorado this past February for a 2 week winter vacation in my 2011 Ecoboost. I went from 17ft below sea level going through "New Orleans LA" to 12,000ft above sea leave going over "Loveland pass". We spent most of our 2 weeks at or above 9,000ft. NOT thinking I put 85 octane in my tank and the truck ran fine. 2 years ago I drove the same trip in my 2005 Nissan Titan and noticed how crappy the truck performed at higher elevation. I was told to use 85 octane so I could regain the power loss from my engine and it worked. Now I would not recommend having that fuel in a Ecoboost tank below 7,000ft. I did switch to 87 octane on my next fill up while we were still in Breckenridge.

 

Ymeskipedia says: If you use the octane prescribed in your owners manual, you'll be fine. 87 Octane is the usual directive at or around sea level in 9-9.5 :1 compression ratio engines. One mile up, your talking reduced air density (less air), so 85 will float your boat even if your owners manual prescribes 87 at or about sea level. Hard driving &/or towing, bump up a grade.

 

 

Boy, I really wasn't trying to start a nasty thread on the matter. I just have never seen Reg 85 before and decided on my trip not to use it, I paid extra for the higher grade but was just wondering why even 85 was being offered. I understand what others are saying here, about the thin air and such but this whole thing did make me go look in the owners manual. Perhaps I just should of looked there first. But was wondering if others used 85 and how it performed.

From the owners manual:

Octane recommendations

3.7L V6/5.0L V8/6.2L V8 engines

Your vehicle will run normally on 87 octane regular fuel. Premium fuel will provide improved performance.

Some stations offer fuels posted as

Regular with an octane rating below 87, particularly in high altitude areas. Fuels with octane levels below 87 are not
recommended for either engine.

So there you have it according to Ford. I never used anything below 87 and I won't in the future. I am good (just pay more in high attitude areas but peace of mind will be worth it)!

 

Sounds like a plan

Don't worry about rigrat he has been up my butt for weeks cause I posted something he did not like. You did not cause that attack he would have done it regardless of any thread I was in

 

The gas may not have been the only reason for the better performance. Remember that engines with turbos have an advantage over non turbo engines at that kind of altitude and ur truck has two of them lol

Btw, awesome pics!

 

Yes, its a high altitude thing. However, at least on the 3.7L if you read the manual carefully, it says in so many words "Use 87 octane gas. In high altitude areas 86 octane gas may be prevalent. Period" the usual yadda-yadda about how you shouldn't worry about lower octane gas at high altitude is missing. I don't know if that's a poorly written manual, or intentional. I live at 7,000 feet, and I have to admit that I didn't notice anything when I filled up with 86.

I do notice that the machine gets considerably better gas mileage when I use higher octane gas. It likes no ethanol high test best of all. Got over 19 mpg on my standard cab 4X2, city driving. I don't think its completely broken in yet. I don't drive much, so I just go ahead and fill up with high test.

I worked it out once, and basically, at current prices for my usage levels it pays to move up a grade if you get more than 1 mpg for the step up.

 

This could get ugly, dude has gone hyper-irrational before.

XLT and Geno are on point.
I freaked a bit the first time I drove in MT. I had never seen 85 before. I used 85 once and was a-ok. I wouldn't fill up with 85 unless staying in the high altitude area long enough to burn it all.
E85 I have never seen. Where is it found?