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Old 01-29-2016, 07:51 AM   #57
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Bruce b - its more of a horsepower/torque war between the big 3. The manufacturer has reached a point of diminishing returns when it comes to fuel mileage.
The engine and drivetrain is managed so much by the trucks computer - you only get the big hp/torque numbers under certain circumstances - this allows the manufacturer to put a warranty on the vehicle and keeps below average drivers from wrapping the truck around a tree...
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Old 01-29-2016, 07:55 AM   #58
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I am a little curious... Why do more horsepower and torque mean better fuel mileage? I am guessing but this sounds a little optimistic...
Am I missing something here?
BB
More low end torque allows for higher rear end ratios and better advantage of using 8 - 9 - 10 speed transmissions. It is counter-intuitive, but my 6.2L, 420 HP, 460ft-lb of torque gets substantially better mileage than the prior generation 4.3 liter 6 speed, let alone the old 5.3L 6 speed.

It just lopes along at 1400 rpm and stays in 4 cyl mode or a high gear....thanks to a lot of low end torque. Comparable results with 9000# of AS on behind.

Mileage is consistently 21.6 solo at 65 mph and 12.5 towing at 63 mph.
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Old 01-29-2016, 08:23 AM   #59
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Diesel vs gas; F150 is rumored to be coming out with the 8-10 speed automatic...paired with the Echoboost; should have improved gas mileage; already plenty of torque there and no diesel issues in cold weather. Just saying...
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Old 01-29-2016, 08:29 AM   #60
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Originally Posted by dznf0g View Post
More low end torque allows for higher rear end ratios and better advantage of using 8 - 9 - 10 speed transmissions. It is counter-intuitive, but my 6.2L, 420 HP, 460ft-lb of torque gets substantially better mileage than the prior generation 4.3 liter 6 speed, let alone the old 5.3L 6 speed.

It just lopes along at 1400 rpm and stays in 4 cyl mode or a high gear....thanks to a lot of low end torque. Comparable results with 9000# of AS on behind.

Mileage is consistently 21.6 solo at 65 mph and 12.5 towing at 63 mph.
Your 21.6 is something I'll never see in my 5.4 F-150 but it seems that most people post similar numbers to what you are seeing towing the various size Airstreams.
We've just driven from New England to Florida towing our Bambi and we saw an average of 12.8 (hand calculated) mpg's...

Most people I've personally asked, who tow with the current generation 250/2500 diesels claim about the same numbers towing...

I will be interested in seeing how it all works out but I remain skeptical... Of course I have been known to be wrong a few times...
BB
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Old 01-29-2016, 08:39 AM   #61
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Diesel vs gas; F150 is rumored to be coming out with the 8-10 speed automatic...paired with the Echoboost; should have improved gas mileage; already plenty of torque there and no diesel issues in cold weather. Just saying...
The general fuel mileage figures I hear people reporting with EcoBoost Fords are not in reality any better than Fords non EcoBoost. The beauty of the engine is its light weight and incredible power output. I'm sure the 10 speed will help on all levels but I don't believe fuel mileage is really going to ever be that good when it is so much fun to step on the gas pedal! That would be my problem with driving an EcoBoost
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Old 01-29-2016, 09:05 AM   #62
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Your 21.6 is something I'll never see in my 5.4 F-150 but it seems that most people post similar numbers to what you are seeing towing the various size Airstreams.
We've just driven from New England to Florida towing our Bambi and we saw an average of 12.8 (hand calculated) mpg's...

Most people I've personally asked, who tow with the current generation 250/2500 diesels claim about the same numbers towing...

I will be interested in seeing how it all works out but I remain skeptical... Of course I have been known to be wrong a few times...
BB
I have towed with several 2500 Duramax trucks (6 speed, of course) and I only saw about 1 mpg higher numbers while solo and towing (post DPF trucks). I waffled for a long time when deciding gas vs. diesel. 6.2 L, 8 speed maxtow won out, when balancing all variables....for me and my duty cycle demands. I just wish I had 2 - 300 more pounds payload. I'm ok with all the "stuff" I load up, but i'm just about at max RGAWR and payload.
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Old 01-29-2016, 09:23 AM   #63
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I am a little curious... Why do more horsepower and torque mean better fuel mileage? I am guessing but this sounds a little optimistic...
Am I missing something here?
BB
Man, you could tow vertical with that machine.
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Old 01-29-2016, 09:26 AM   #64
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Man, you could tow vertical with that machine.
Of course for the kind of money they cost you should be able to.
One thing though, owning and maintaining a diesel in the long run can also be very expensive.
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Old 01-29-2016, 12:29 PM   #65
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Would recommend EcoBoost V6 rather than 5L.
I'll second that.
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Old 01-29-2016, 10:44 PM   #66
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2016 Ford F150 vs F250

Not much that difference in maintenance.I have had two Ford 6.7 turbo diesels and will not be going back to a gas tow vehicle any time soon.They cost more to buy but the resale is higher so you get it back when trade.There is big difference in the overall towing experience when pulling a larger trailer.We have a 28ft international and pull approximately 12-15000 miles per year.


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Old 01-30-2016, 04:32 AM   #67
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I have a buddy with a 2015 SD F250 diesel with 4:10 gears and empty he gets 13 - 14 mpg, pulling his 27' AS he gets 10 - 11 mpg. He has had it back to Ford 3 times because of bad fuel consumption and they tell him it is all the emission controls on the newer diesel motors that are killing the fuel mileage. He is not a happy camper after spending $62K on a truck.

You can tell your friend that his low mileage is due to his gearing in the rear end. We have an F350 6.7 with a 3.31 rear end which we ordered as this vehicle is my daily driver. We tow a 30' 2015 FC. We get, hand calculated average around 21 MPG on the highway not towing and 13.8 average towing. I can get as high as 15mpg towing if I keep the truck at about 55mph, but I seldom do. Usually around 65mph.

We have had Super Duties in the past with higher rear ends and 30' AS and realized we did not need the 4.10 at all and could easily tow just about anything we want with the lower rear, which we can. Across country last year and all up and down the Rockies and Cascades not one issue with towing ability or down hill engine braking ability.

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Old 01-30-2016, 07:15 AM   #68
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These have been great replies to my original post. I currently have a Tundra and have reluctantly decided to give it up because of its limited payload once we by our Airstream. So from these posts and others on the forum I've decide to more seriously consider the 3.5L Ecoboost option in a F150 and to test drive a F250 to see how we'd like it for our driving when not towing. Since I'm not in a hurry, I think I'll wait and see what the new Titan XD with the 5 L Cummins looks like this spring, and if it maybe hits a sweet spot between a 1/2 ton gas engine and 3/4 ton diesel.
If you're still looking at this thread may I suggest another option - the F-350 Powerstroke Diesel. We had the F-150 V-8 6.2L and had no issues ever in towing but came oh so close to payload capacity. While at our Ford dealer for servicing our other vehicle (yes we are Ford people!!) we started the look for a new TV. I didn't want to give up the comfort ride of our 150 but ....... The new super duty diesels were on the lot and the next thing you know we're test driving an F-250 diesel! After ALOT of research done by my hubbie we make the shift to getting the F-350 diesel with all the towing, payload and any other "issue" you can think of covered! But the real decision was made by the test drive, and I can assure you I am loving the comfort ride of our new TV, now known as "The Pearl"!
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Old 01-30-2016, 07:38 AM   #69
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The rumor about a F 150 diesel with a 10 speed trans sounds interesting to me, but thats 2017
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Old 01-30-2016, 09:15 AM   #70
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I am a little curious... Why do more horsepower and torque mean better fuel mileage? I am guessing but this sounds a little optimistic...
Am I missing something here?
BB
I am at a loss reading the mileage and performance comparisons between the diesel and gas mainly the Ford Eco Boost.
The additional cost for the diesel to purchase and own is difficult for me justify.
It takes a long time to realize the difference in fuel savings.
That's not to say if that is the toy you wan't go for it.
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