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Old 05-31-2012, 09:00 AM   #41
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Originally Posted by william.migues View Post
No, I live in South Louisiana; no mountains here. No plans right now to pull to any mountains.
Ok.. Just checking .. i would like to find out what a F250 with the 6.2 engine gets towing a 5th (say 10,000 lbs loaded) wheel over mountains ..
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Old 05-31-2012, 09:11 AM   #42
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There are so many variables when figuring mileage. Head winds (or tail winds) hills, speed, traffic, stop lights, how fast you accelerate, etc.

Also, I very seldom use cruise control while towing. With the rolling hills around here, I have to leave the tranny in 3rd (4 speed auto) if I use cruise control. In 4th, cruise control will make the transmission shift way too much. In 4th, with my right foot in command, I can loose a couple of mph on the uphills, and gain them back on the downhills without the transmission shifting. I seem to get much better fuel mileage that way.
X2. Driving style is HUGE in mileage; perhaps bigger than any other single factor.

I use cruise control a lot when towing; but Mtnguy is exactly right; it costs more in fuel, and can be annoying when lots of rolling hills; resulting in lots of shifting. In that case, I also shut off the cruise.

My Ecoboost has averaged 20.4 over the last 1,500 miles in mixed driving; empty. On our recent 3,300 mile towing trip, we averaged 11.5. That was mostly 60 mph pulling a 5,500 pound Surveyor. On that trip I used cruise almost exclusively; and I know it cost me fuel. But I can't hold the throttle manually for that long a trip.
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Old 05-31-2012, 09:14 AM   #43
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When it comes right down to it, will 2-3 mpg, or 5-6 mpg difference change our plans? Are we going to leave our TT, fifth wheel, Roo, motorhome, pop-up, etc. sit in the driveway because of our gas/diesel mileage? NO! We bought them to use and enjoy! This issue must be a "man" thing, LOL, because it really doesn't matter to me what our mpg is. I just know we tow it, we camp and we have fun. Nothing else matters to me.....
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Old 05-31-2012, 09:20 AM   #44
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When it comes right down to it, will 2-3 mpg, or 5-6 mpg difference change our plans? Are we going to leave our TT, fifth wheel, Roo, motorhome, pop-up, etc. sit in the driveway because of our gas/diesel mileage? NO! We bought them to use and enjoy! This issue must be a "man" thing, LOL, because it really doesn't matter to me what our mpg is. I just know we tow it, we camp and we have fun. Nothing else matters to me.....
HA! I love it!! Exactly right!
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Old 05-31-2012, 09:25 AM   #45
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Thats because it shifts later and may run in a higher gear more often .
Do you run in overdrive with tow /haul or next lower gear ?
seems to run in 5th most of the time - but will get to overdrive on the flats

confused over your first sentence --if it shifts later, woudn't i be in a lower gear more often
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Old 05-31-2012, 09:35 AM   #46
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Lower gear = higher RPM's = lower MPG's.

I have 3.73, 5.4 F150 and get 9-10 towing, 16-17 empty highway, and 14-15 around town.
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Old 05-31-2012, 09:42 AM   #47
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Originally Posted by LFugate View Post
Lower gear = higher RPM's = lower MPG's.
In the flats, I will have to agree with that. In the hills, I think the lower gear ratio might even help mileage. Less down shifting, and a little higher revs when climbing should help with the gas consumtion.

Just my personal idea.
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Old 05-31-2012, 09:51 AM   #48
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Originally Posted by mtnguy View Post
In the flats, I will have to agree with that. In the hills, I think the lower gear ratio might even help mileage. Less down shifting, and a little higher revs when climbing should help with the gas consumtion.

Just my personal idea.
Agreed! Not letting your TV downshift when it needs to would be foolish and could cause damage. I always lock out overdrive on my F150 because I don't want it shifting up and down all the time.
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Old 05-31-2012, 11:02 AM   #49
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Agreed! Not letting your TV downshift when it needs to would be foolish and could cause damage. I always lock out overdrive on my F150 because I don't want it shifting up and down all the time.
Yep. I did that quite a bit with my '05 5.4. Holding overdrive was very "tenuous"! Every TV and TT combination is unique so we all have to do what is best for our situation. My Ecoboost holds 6th/lockup so well that I just let the vehicle manage itself. Kick-downs are rare. Exception is slower 55 mph 2-lanes with rolling hills. There RPMs are so low that it will shift constantly in that situation. So I lock out 6th there. So, even with the same TV and TT, your strategy can change depending on speed, hills, wind, etc.
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Old 05-31-2012, 11:04 AM   #50
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Originally Posted by boubou
So far,towing 6000l lbs in northern ontario hills: 9.5 mph with 5.7 dodge ram hemi 2010
Not 9.5 mph rofl but 9.5 mpg

I din't understand how this works. I have tow/haul button on and see 5 on the dash. Now, going uphill, i know the transmission is shifting down but how do I know what speed it's in? The display stays on 5. If I press - to shift down manually, jt then puts me to what speed it's currently on like it was in 2nd gear going up a good incline. Should I downshift going uphill or let the transmission do the work?
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