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Discussion Starter #1
Hello everyone
I recently took my Camper on an over 6,000 mile, one month long, camping tour of the USA. I would like to share my thoughts and observations I had along the way. I own a 2018 Lariat 4x4 extended cab 6.5 foot bed towing a 8,000 lbs gvwr 30 foot 5th wheel.
1 : expect very poor mileage on the highway with any kind of head wind. 9.5 mpg crossing Iowa and Illinois with 15 mph head wind.
2 : expect to use a LOT of DEF wile towing in said head wind.
3 : the computer is VERY VERY slow adjusting to high altitude, once it does adjust, no problem.
4 : I made MUCH better mileage towing on rural roads than I did on the highway ??? 14-16 mpg depending on terrane.
5 : don't expect to get anything over 8th gear on the highway with turbo maxed out ??? 11-12 mpg ( part of the mileage problem)? Rural roads, no problem. could be simple wind resistance?
6 : while I never felt out of control on down grades the truck really could use a engine or exhaust brake. But I am an experienced hauler. And the transmission downshifts did help.
7 : The truck held up fine. No breakdowns,
8 : The camper held up fine also.
9 : I passed a lot of gas powered camper haulers on up grades of all makes and models.
10 : Don't bother looking for DEF fluid in Walmart's out west. they have a shelf slot for it but don't have any ??
11 : I seriously considered getting the extended range titan fuel tank for this trip. So glad I did not waste the money. unless you plan to spend several weeks driving in an area with no fuel stations, like the Australian Outback, I just don't see the need anywhere in the USA. even with the poorer mpgs while towing the need to stop for nature calls, food or drinks will necessitate stops anyway.

Anyone with specific questions? ask away

Mike
 

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Discussion Starter #6
I seem to remember from other posts that there is a sticker on the frame that has the number you need for the gear ratio. Can someone remind me where it’s located?
 

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@mbates6o - didn't use any stickers but I isolated down the limited selection of axles we can get on the F150 diesels here: Axle and Frame Research

FYI - the search capability within the new format for the forums is very nice and useful
 

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Discussion Starter #9
Gear ratio seems to be 3.31 according to the L3 axle code on the door pillar
 

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I’m probably the minority that thinks any fifth wheel is too large for these 3.0L trucks, regardless of the configuration. Regardless, I am very pleased with towing our TT at 6,000# loaded. I ran Super Duty diesel trucks almost exclusively over the past 22 years, and none of them would have ever netted an mpg close to my 3.0L towing. Last fall, I pulled almost 5k of flat bed with a bunch of quads up north. Coming back, almost 21mpg hand calculated. My dad running empty with a 2011 6.7L deleted, pulled 19mpg. With our TT, 13-15mpg is very do-able, until wind kicks in. Pulling north to Door County, WI, we fought a headwind and pulled 13mpg. DEF does go quicker, but with temperatures up in the truck, active regenerations were limited. Really, if in the realistic parameters, not Fords inflated numbers, the 3.0L is very good. On the interstate, mine rarely pulls out of tenth gear with the TT. I believe I’m running 3.31 gears, too.
 

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Discussion Starter #11
While I will admit that I would not want to tow anything much larger with my stock truck. In my experience 5th wheels and goose neck trailers are much more stable than all but the very lightweight bumper pulls. And so as not to confuse anyone I did pull some very steep and long mountain passes thru the Rocky Mountains. Rabbit ears pass was just one of several.
While towing in flat states below 65 mph I think I got great mileage. Compared to the 250 with the 6.2 gasser I had before it was no contest mpg wise. In that I was lucky to get 7-8 mpg with the same trailer. So 11-12+ is fantastic in my book.
Another positive note is that I had the oil and all the filters changed before we headed out and I am finally closing in on the 10,000 mile oil change interval that was touted when I bought it. Before this trip I was lucky to get to 4000 miles on a change.
 
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