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Old 11-26-2021, 05:50 PM   #61
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[QUOTE=sportcoupe;324464]...if you stay at high elevation, you can possible run 85 while there, just as long as you don't leave the high elevation during the tankfull.


You are 100% correct.
MY TWO COUNTIES, not state, go from 9,000ft altitude paved roads to 220ft altitude paved roads in 180 road miles.
7,200ft to 233ft in a 160mile stretch of I-40 in just one and a quarter counties.
So
We have stations here to remove your 85 and replace it with 87. They Siphon your tank and refill with 87.

It's imparable. No excuses. Everyone does it.

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Old 11-26-2021, 07:50 PM   #62
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Originally Posted by sportcoupe View Post
I posted for the OP based on their rig, a 2020 Vegas with the V10 on E series chassis.

The 7.3L V8 on E-Series chassis reads the same.



If you stay at high elevation, you can possible run 85 while there, just as long as you don't leave the high elevation during the tankfull.

You can spend 12 mins and dig into the details on why in this video.


.
Wow was it you that brought up Internet Engineers If I followed correctly; this guy was comparing cars made in 1942 to cars made in 1987 which he referred to the latter as modern cars So is this video 34 years old or what; I may have missed something.

But your statement "If you stay at high elevation, you can possible run 85 while there, just as long as you don't leave the high elevation during the tankfull." is relevant and my point.

To my knowledge and to my point the 85 or 86 is only available where altitude comes into play. 87 is NOT available; so you have to buy 85, 86, or 91 PERIOD unless Ford proposes you haul your own 87 gas. I never buy 91, if I was told I must, I may not have bought the F-53.

Where I might agree and have little flex was say I drive from Dallas to Amarillo, I will likely have left Dallas with a full tank of 87; by the time I am in Amarillo, I may see 86 being sold. If I was going to pick up something in Amarillo and head back to Dallas, I may only get 1/2 tank, but if I am going to Colorado, I fill up and likely fill up again somewhere near New Mexico / Texas Border (all 85 at that point). The reverse is true as well, as I head back to Dallas, when I am away from the altitudes I will see the 86 and 87s again. 85 octane is not a finite spot. If you driving and run into it you need it, it is not like I am driving around Dallas every day at 400ft with 85 octane in my RV.

FWIW, I just washed my RV and couldn't help but notice that on my gas cap it says exactly

Gasoline / E0 - E15

So that doesn't specify any kind of gasoline and does specify 15% or less Ethanol which both contradict my manual.

Before this thread, I never would have used E85 in my RV; now I rethinking that, need to find out what Onan says about for my 5500.

But this ain't all too complicated. When I get out at a gas station, I always pump 87, if it ain't there; and I see 85 or 86, I know I am climbing in altitude; so I buy it until I no longer see 85 or 86 because I am either heading home or descending in altitude.

Something else I always do, when I first buy 85 octane gas; I do set my Onan 5500 Generator altitude adjustment to a setting, normally 4 or 5 thousand feet
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Old 11-26-2021, 07:58 PM   #63
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[QUOTE=ducksface;324470]
Quote:
Originally Posted by sportcoupe View Post
...if you stay at high elevation, you can possible run 85 while there, just as long as you don't leave the high elevation during the tankfull.


You are 100% correct.
MY TWO COUNTIES, not state, go from 9,000ft altitude paved roads to 220ft altitude paved roads in 180 road miles.
7,200ft to 233ft in a 160mile stretch of I-40 in just one and a quarter counties.
So
We have stations here to remove your 85 and replace it with 87. They Siphon your tank and refill with 87.

It's imparable. No excuses. Everyone does it.
One day I wish to learn how you get all of the words. "imparable" says it all

But let me say this, if I lose my RV's engine because I used 85 octane while driving to the damn Rocky Mountains, so be it; I will simply write it off as an impairment
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Old 11-26-2021, 08:06 PM   #64
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About alternative facts:

The sky is not blue
The sun does not set in the West
Walnuts are not nuts.

Name some others.

Disco is music.
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Old 11-26-2021, 08:46 PM   #65
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Old 12-01-2021, 08:04 PM   #66
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I have use 85 in v10 for the past couple of years most of the time Costco and have not had any problems. Refill when get below 3000 feet as most stations then have 87.
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Old 12-01-2021, 11:10 PM   #67
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I actually thought my manual for F-53 says to use 87 octane and not anything higher? Maybe I am confusing vehicles, but I am fairly certain that it is not a good thing for all vehicles to use a higher octane than recommended. But I do follow your premise. But for me; if 87 is not available, I will get 86 or 85 which ever is cheaper. I don't think about anything other than if the gas costs more than $3 a gallon, then I start to get pissed It is down to $2.88 here for 87 octane; so I may be removing my For Sale sign soon. If I can afford the gas, I can afford the RV again
Gasoline by summer will $4.00 per gallon.diesel now $4.5 at the truck stop
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Old 12-01-2021, 11:21 PM   #68
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[QUOTE=dkoldman;324498]
Quote:
Originally Posted by ducksface View Post

One day I wish to learn how you get all of the words. "imparable" says it all

But let me say this, if I lose my RV's engine because I used 85 octane while driving to the damn Rocky Mountains, so be it; I will simply write it off as an impairment
If I have half tank with 85 octane can I fill up with 91 octane.. or 89 octane?
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Old 12-02-2021, 12:26 AM   #69
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[QUOTE=Mgtv53;325151]
Quote:
Originally Posted by dkoldman View Post

If I have half tank with 85 octane can I fill up with 91 octane.. or 89 octane?
Yes. If half is 85 and the other half is 89; then you have 87 octane.

This is really so simple, I always buy 87 if available, I buy the 86 or 85. If I am able to buy 86 or 85 I am over 3,000 feet.
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Old 12-02-2021, 12:31 AM   #70
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Originally Posted by Mgtv53 View Post
Gasoline by summer will $4.00 per gallon.diesel now $4.5 at the truck stop
When and if that happens I will start complaining again, I will stand at that pump SMH.

In Dallas the gas has dropped down to $2.50 and $2.30 at the lowest price in town. I ain't mad about gas anymore; I get to keep my RV... at least a few more months before I suddenly can afford it again.
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Old 12-02-2021, 12:48 AM   #71
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Better check owners guide, too much Ethanol is not good for the fuel system over time.
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Old 12-02-2021, 12:52 AM   #72
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Better check owners guide, too much Ethanol is not good for the fuel system over time.
I don't think we are talking Ethanol?

85 Octane is the focal point. If you wish to discuss Ethanol blends it is 15% or less
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Old 12-02-2021, 12:58 AM   #73
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I get it, but many stations have 10% mix already. If he is referring to E85, that will be an issue. No problem so long as it is 85 octane - right?
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Old 12-02-2021, 01:07 AM   #74
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I get it, but many stations have 10% mix already. If he is referring to E85, that will be an issue. No problem so long as it is 85 octane - right?
My F53 accepts E85 E0-E15 but I have never used it, it is on the gas caps and in manual if it is permissible. They say 15% or less

85 octane is different fuel and not the same E85. 85 Octane is unleaded fuel designed for high altitudes; Ford manuals do not tell you not to use it, they say if used and there is engine damage it may not be covered under warranty. I use 85 octane all the time and I would not hesitate if I needed to put E85 in.
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Old 12-02-2021, 08:32 AM   #75
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Wow was it you that brought up Internet Engineers If I followed correctly; this guy was comparing cars made in 1942 to cars made in 1987 which he referred to the latter as modern cars So is this video 34 years old or what; I may have missed something.
I don't believe I brought up internet engineers. I typically wouldn't make that type of statement, being myself an actual engineer

1987 is pretty much the switchover year from carbs to computer controlled fuel injection overall, at least for GM. Of course there are outliers but this is when the old carb was phased out and modern injection was born. Of course fuel injection was before 1987, but it was clunky. And todays fuel injection is even better of course.


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To my knowledge and to my point the 85 or 86 is only available where altitude comes into play. 87 is NOT available; so you have to buy 85, 86, or 91 PERIOD unless Ford proposes you haul your own 87 gas. I never buy 91, if I was told I must, I may not have bought the F-53.
87 is the minimum rating required by Ford. It is not an absolute. If I see 85 and 91, guess what? I am pumping 91 because I am not staying, just passing through and my tank is huge. Its all about smiles per mile, not dollars per mile in my RV.

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Old 12-02-2021, 12:30 PM   #76
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When and if that happens I will start complaining again, I will stand at that pump SMH.

In Dallas the gas has dropped down to $2.50 and $2.30 at the lowest price in town. I ain't mad about gas anymore; I get to keep my RV... at least a few more months before I suddenly can afford it again.
I hope those price drops ripple quickly to NC!
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Old 12-02-2021, 01:41 PM   #77
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I don't believe I brought up internet engineers. I typically wouldn't make that type of statement, being myself an actual engineer

1987 is pretty much the switchover year from carbs to computer controlled fuel injection overall, at least for GM. Of course there are outliers but this is when the old carb was phased out and modern injection was born. Of course fuel injection was before 1987, but it was clunky. And todays fuel injection is even better of course.




87 is the minimum rating required by Ford. It is not an absolute. If I see 85 and 91, guess what? I am pumping 91 because I am not staying, just passing through and my tank is huge. Its all about smiles per mile, not dollars per mile in my RV.

.
My Ford Manual for 2018 F53 says the 87 Octane is the minimum rating recommended. It never says to not use, but does say if you do use, engine damage may not be covered.

By contrast the same manual does say to not use Ethanol blends greater than 15%.

With all that said I think using 91 is no question better than 85 or 86. But the same is true that 91 is better than 87. But that is your option; although perhaps not the question.

In my view 85 & 86 is made for a reason, above a few poster stated it's technical function in engines in high altitudes. As long as it is available I will always use, unless my manual says that I can't use. That would be a big statement for Ford to make; and I doubt they ever do. For the record, I have never bought 91 octane in my life, not because of a manual or gas performance, but because of price. I have also never had an engine issue related to gas. I welcome not only 85 or 86 when it is available; but also the break in price that comes with it.

Just so you know, my tank is 80 gallons; 98% of the time I buy gas north of 1/4 tank; so most times I am buying 55 gallons of the cheapest gas available at the pump that is NOT ethanol. I do the latter 100% without a thought. I would say 99% of all my gas is 87 Octane and 1% 85 or 86 Octane in the big picture. No big deal for me.
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Old 12-03-2021, 01:44 PM   #78
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I hope those price drops ripple quickly to NC!
A recent fuel price drop was caused my strategic oil reserve manipulation. Purely PR maneuver designed to give the appearance of increased supply and lowering pricing. That stunt won't make up for pipeline shut downs, OPEC cuts, permit denying, etc. Again pure PR stunt to try to help poll numbers that media jumped on as successful.
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Old 12-03-2021, 03:18 PM   #79
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A recent fuel price drop was caused my strategic oil reserve manipulation. Purely PR maneuver designed to give the appearance of increased supply and lowering pricing. That stunt won't make up for pipeline shut downs, OPEC cuts, permit denying, etc. Again pure PR stunt to try to help poll numbers that media jumped on as successful.
Oil reserve went to China and India not for us it’s political stunt.
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Old 12-03-2021, 03:22 PM   #80
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A recent fuel price drop was caused my strategic oil reserve manipulation. Purely PR maneuver designed to give the appearance of increased supply and lowering pricing. That stunt won't make up for pipeline shut downs, OPEC cuts, permit denying, etc. Again pure PR stunt to try to help poll numbers that media jumped on as successful.
Last year America set the price world wide for oil: now it is OPEC and Russia. We no longer have any say. The strategic oil release the majority of the oil went to India and China. I am happy for those in the states where the price has pulled back. My guess you will not be coming to the west coast for a trip: $4.80 for diesel : $4.60 for regular in California
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