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Old 09-02-2016, 06:05 PM   #15
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Originally Posted by llanderson64 View Post
We have the same set up but have never gotten 15mpg. <<< snip >>>
What is your typical towing speed (can make a LOT of difference)?

Do you still have 14" wheels/tires on your 23, or have you upgraded to 15"s? (might make a difference, I don't know)
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Old 09-02-2016, 06:09 PM   #16
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Originally Posted by pappy19 View Post
<<< snip >>> The 5.0 can run on 85 octane while the turbos recommend premium gasoline when towing. <<< snip >>>.
Ford's "recommendation" notwithstanding, I have yet to put a single drop of premium gasoline in the EcoBoost! I had to do that with the supercharged Toyota Land Cruiser... not doing it with this one.
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Old 09-03-2016, 07:49 AM   #17
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RFP - Thanks for the directions. I did figure out how to lock out the 6 gear.
We typically try to stay off the freeway, so 60 is probably average for us. Is it best to have the tow/haul on at all times? Would you lock out 6th gear when traveling on the freeway at faster mph? Perhaps I need a little "F150 Tow/Haul & 6th Gear Lock Out for Dummies" primer? I am always amazed at how knowledgeable you all are.
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Old 09-03-2016, 07:44 PM   #18
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Ford's "recommendation" notwithstanding, I have yet to put a single drop of premium gasoline in the EcoBoost! I had to do that with the supercharged Toyota Land Cruiser... not doing it with this one.
Yeah I am not sure where that came from. I talked again with my Ford contact and he said not way is that a requirement for the 3.5 EB to have to run on premium grade and that it will tow just fine on any fuel grade.

These are the internet rumors that fly out there that get wings and should not IMHO.
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Old 09-03-2016, 07:56 PM   #19
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Tow Mode

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Originally Posted by llanderson64 View Post
RFP - Thanks for the directions. I did figure out how to lock out the 6 gear.
We typically try to stay off the freeway, so 60 is probably average for us. Is it best to have the tow/haul on at all times? Would you lock out 6th gear when traveling on the freeway at faster mph? Perhaps I need a little "F150 Tow/Haul & 6th Gear Lock Out for Dummies" primer? I am always amazed at how knowledgeable you all are.
You should ALWAYS use tow mode when you have anything hooked to your bumper. It will save your transmission and improve performance. It also helps in changing shift points going up and braking going down.

My 1 ton Dodge (2007) had the "lock out" that you Ford drivers are calling this. Basically all your are doing is manually putting the automatic transmission in 5th but allowing it to act like an automatic from 1st to 5th gear. Again, this is blocking out the old "overdrive" transmission gear and putting the gear ratio of the vehicle in an overall lower state.

Now using this feature would and could be used when in hilly or mountain regions OR if extra quick transmission response is needed. Also, it would be used if you were on flat land and pulling a heavy load maxing out your GVWR of your vehicle. I usually used this when I was in tow mode and pulling a heavy (15K+) load with my 1 ton on flat roads.
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Old 09-03-2016, 10:55 PM   #20
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Originally Posted by eartick View Post
Yeah I am not sure where that came from. I talked again with my Ford contact and he said not way is that a requirement for the 3.5 EB to have to run on premium grade and that it will tow just fine on any fuel grade.

These are the internet rumors that fly out there that get wings and should not IMHO.
I have had mostly turbocharged engines in my daily-driver vehicles since 1981. I tend to keep vehicles 8-10 years or so (my turbocharged Legacy Limited wagon with a 5-speed manual is 11 years old, for example) and I have replaced exactly one turbo, on a 1980 Mercury Capri 2.3 Turbo with a carburetor and no water-jacket for cooling the turbo bearing. I replaced that turbo at 145,000 miles.

There *IS* a benefit from running premium, if you drive like you stole it all the time. I've found that I can still drive like a schmuck as long as I keep up with the maintenance, and get both good performance and good service out of my forced-induction engines. Since I drive like that all the time, I can tell the difference when I'm running higher octane... on the newer cars, the computer dials back the boost less often. On the older ones, the warning lights came on less often. Good filters, good oil, regular change cycles, keep the radiators and intercoolers clean, etc.

The 3.5 Ecoboost makes enough power at low enough RPM to walk away from a 5.0 at altitude, even on regular Unleaded. If you're towing heavy or you like to tow 70 (on LT trailer tires of course, let's not confuse this argument) then you'll probably see some benefit from Super. Even with Regular, though, the pressure-altitude compensation is going to make a big difference towing above 4000 ft or so. While the 5.0 may do it, especially with a light-ish trailer and a high-numerical diff, you'll be beating it like a redheaded stepchild. My old 5.4 is hoping I trade it off before I take an Argosy back to Colorado, I guarantee it.
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Old 09-04-2016, 05:30 AM   #21
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sounds good

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I have had mostly turbocharged engines in my daily-driver vehicles since 1981. I tend to keep vehicles 8-10 years or so (my turbocharged Legacy Limited wagon with a 5-speed manual is 11 years old, for example) and I have replaced exactly one turbo, on a 1980 Mercury Capri 2.3 Turbo with a carburetor and no water-jacket for cooling the turbo bearing. I replaced that turbo at 145,000 miles.

There *IS* a benefit from running premium, if you drive like you stole it all the time. I've found that I can still drive like a schmuck as long as I keep up with the maintenance, and get both good performance and good service out of my forced-induction engines. Since I drive like that all the time, I can tell the difference when I'm running higher octane... on the newer cars, the computer dials back the boost less often. On the older ones, the warning lights came on less often. Good filters, good oil, regular change cycles, keep the radiators and intercoolers clean, etc.

The 3.5 Ecoboost makes enough power at low enough RPM to walk away from a 5.0 at altitude, even on regular Unleaded. If you're towing heavy or you like to tow 70 (on LT trailer tires of course, let's not confuse this argument) then you'll probably see some benefit from Super. Even with Regular, though, the pressure-altitude compensation is going to make a big difference towing above 4000 ft or so. While the 5.0 may do it, especially with a light-ish trailer and a high-numerical diff, you'll be beating it like a redheaded stepchild. My old 5.4 is hoping I trade it off before I take an Argosy back to Colorado, I guarantee it.
Sounds like you been there.

I do all my own maintenance and stay on top of it. My wife unit does not know why I need all this oil and filters I buy all the time. I told it is kinda like her makeup and trips to the nail salon, maintenance...bwhahahahaha

Should know something next week. Found that truck with the 3.5 and 3.73 diff, max towing package. Probably overkill for the AS but when I put my foot in it, I want it to move
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Old 09-04-2016, 10:08 AM   #22
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Yeah I am not sure where that came from. I talked again with my Ford contact and he said not way is that a requirement for the 3.5 EB to have to run on premium grade and that it will tow just fine on any fuel grade.

These are the internet rumors that fly out there that get wings and should not IMHO.
Not to be argumentative but: I have been towing with my 2012 F-150 EB for 85,000 miles. About half of that out west on all the various mountain passes.
What I noticed over the years that low octane gasoline often time is marginal to begin with. On sudden inclines, where it is difficult to build momentum thus, rpm without which you can not get the torque build up fast enough the engine will begin to overheat. If the incline is long and extended the engine will overheat before it can built the RPM. Using 91 octane eliminates this problem. I have experimented with this time and again and it works better.Once you get the RPM up to 3000 nothing will stop that beast.
As to locking out 6th gear in Tow Haul its totally unnecessary. TH mode retards up-shifting to keep up the RPM needed for max torque by design.
You will run into more problems especially playing with it manually if you don't have experience than necessary.
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Old 09-04-2016, 11:20 AM   #23
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Not to be argumentative but: <<< snip >>> TH mode retards up-shifting to keep up the RPM needed for max torque by design.
By locking out 6th gear, we were reading 2100 RPM at 60 MPH... right at the start of the handsome flat top of the torque curve. With that much torque on tap, throttle opening was small and the engine was positively loafing. Our very best performance (including MPG) occurred when in Tow/Haul with 6th locked out. Necessary? Certainly not! Beneficial? Absolutely... Our 'numbers' prove it.


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You will run into more problems especially playing with it manually if you don't have experience than necessary.
"Not to be argumentative but:" What problems? I've got a boatload of experience... through years of racing competition Porsches, I've got this torque/shifting stuff figured out thank you very much.
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Old 09-04-2016, 11:22 AM   #24
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<<< snip >>> On sudden inclines, where it is difficult to build momentum thus, rpm without which you can not get the torque build up fast enough the engine will begin to overheat. If the incline is long and extended the engine will overheat before it can built the RPM. <<< snip >>>
We had not one second of overheating... not even a hint. Even the transmission stayed cool, never exceeding 201-degrees.
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Old 09-04-2016, 11:29 AM   #25
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Do you know what gear package you are running? Just asking not doubting your word. Like I said earlier my bud has a 5.0 and a 3.31 gear package and struggles in hills but put him on flat land and he is gone
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Old 09-04-2016, 11:43 AM   #26
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Do you know what gear package you are running? Just asking not doubting your word. Like I said earlier my bud has a 5.0 and a 3.31 gear package and struggles in hills but put him on flat land and he is gone
Yep... 3.55 'electronic lock' axle.

Your friend's experience is fairly predictable. The torque available at the relatively low RPM of 2000 with the 5.0 is pretty anemic as compared to the 3.5 EB. Couple that with the 3.31 and it's truly underwhelming.
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Old 09-04-2016, 06:47 PM   #27
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We just returned from our first 'big' outing with the 23D International Serenity... a month-long trip. Since I didn't bend, break, poke, stain, or flood anything, I counted the trip a major success.

Our trip was 3,100 miles through New Mexico, Colorado (mostly), Utah, and a little bit of Arizona. Following are my thoughts on the 23D/F150 combination:

The set-up:
2014 Airstream 23D International Signature
15" Sendel wheels and Michelin 'LTX' tires replacing the OEM fourteeners
2015 Ford XLT SuperCrew F150 with 3.5 EcoBoost, Max Tow
Reese 'SC' WD hitch with 800-pound spring bars

The truck handled the 23D with zero issues. The trailer was rock steady with never the slightest hint of sway or other instability. The truck's transmission operates seamlessly between gears and the 'smart' downshifting when descending significant grades was impressive. The 3.5 EcoBoost had plenty of power and was able to handle even some pretty steep grades with apparent ease and no strain.

The first thousand miles or so of the trip, I set the truck to TOW/HAUL mode, but did not lock it out of 6th gear. Towing was effortless, but once I changed to lock the transmission out of 6th gear, fuel mileage improved dramatically.

Towing at a more or less consistent 60 MPH (2,100 RPM) we averaged for the entire trip just over 15 MPG. I'm confident it would have been notably better if I had done the sixth gear lock out for the entire trip.

The truck was very quiet and comfortable.

All in all, I couldn't be happier!

Rob
I pull a 25' AS with my 2013 3.5 SuperCab EcoBoost 3.37 Axle and it does an great job with no problems. Can top the hills in TX at just about any speed. GailMac
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Old 09-05-2016, 09:59 AM   #28
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We had not one second of overheating... not even a hint. Even the transmission stayed cool, never exceeding 201-degrees.

PS: I am pulling a 30' International that weighs in trip ready at 7,400 lbs.The truck is loaded to max capacity. My EB has the 3.73 axle. I never had any issues with trans overheating but did experience engine overheating on a couple of occasions as I described previously.
I don't get the mileage that the people with the shorter units seem to get.
At 60 on straight away driving I get 12.5 to 13. As soon as I push it at 70, it drops to 11.0 to 11.5. Pulling over Vail Pass on I 70 it drops down to 8 mpg.
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