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Old 04-16-2014, 08:32 AM   #71
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I have a 2011 F150 Ecoboost 4x4 with 373 gears. When I first picked up my similar weighted Work and Play trailer and towed home at 65-68 mph I got 7.5-8 mpg. I hated my truck and was ready to trade for a diesel on the way home. I then read on this forum that when towing, 60 mph seems to be the magic number. I slowed to 60 and my milage went up to 10.5, an almost 25% increase.

I always think I may want a diesel but with what I am towing and the cost differences I just can't make the costs justify the change. Try slowing to 60 (and it is hard as the Ecoboost really wants to go faster) and I think you will see a big difference.
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Old 04-16-2014, 08:41 AM   #72
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Everyone can justify why they have what they have whether it be a gasser or a diesel and shade it in favor of their own decision. Some just have to have the biggest or newest to have something to brag about.

Mine is pure economics, my old truck is paid for, does a decent job of pulling our 5er and I can't see any reason for buying a new one to do the same thing. I would rather spend the money on other things than give it to GM, Ford or Dodge and finance companies. JMO.
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Old 04-16-2014, 08:44 AM   #73
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those trying to discredit the benefits of buying diesel need to do a little more homework. Its not an $10,000 option. The trucks don't cost $60,000+. Diesel is not 60 cents per gallon more. Last August I paid $47,000 for a new 2014 crew cab long bed 1 ton 4x4 Duramax truck. My towing mileage went from 7.5 to 12+. That's over a 50% increase in mileage, and since the fuel only costs 15 cents per gallon more, I'm saving a money on fuel. With all the available power and lack of shifting like crazy on the slightest of hills, its a win win situation. Keep in mind that at 200,000 miles, the value of the diesel truck will be MUCH higher than an equivalent gas. Meaning you used all the extra power for no charge
Dang, I've not seen a new truck like that under $50k in a long time, you stole it! I just built one online and it came in at $55k with just the base LT package and the Duramax engine, which is $8,299 with the Allison.

Second, diesel is only 15 cents more per gallon there? It's always 40 to 50 cents more than 87 octane here. Is your diesel cheap or is your gas expensive?
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Old 04-16-2014, 09:10 AM   #74
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Diesel has been 20% higher for years around here. Just recently gas has climbed narrowing the difference to about 10%, but I don't think that'll hold if the past is any indication, especially if we start seeing more 1/2 tons using diesel. With that being said, if you can afford it, always go diesel, IMO, if towing. You do get a large portion- maybe all- of your investment on the diesel back, but you have to be able to afford tying up ~$8K for the time you own the truck. As far as finding an 06-07 Dodge w/ a 5.9- all I'll say is good luck. In my area those are selling for $20K plus in decent shape with mileage in the low 100K's (110-140K). I've yet to come across one I'd consider immaculate. The vast majority I've looked at (dozens upon dozens) are in very poor shape, having been worked hard and abused, or they have been driven by some kid that has slapped all types of performance accessories on it and driven the snot out of it. As far as mileage goes- you will never get the same towing mileage out of a gas engine. There are fewer BTU's of energy in a gallon of gasoline than a gallon of diesel and it WILL require more to produce the same amount of work. As a side note to other Ecoboost owners- I noticed much improved mileage in 4th at ~2850 RPM than I did in 5th at (IIRC) ~2500 RPM. In 5th I could tell I was running more boost pressure which I believe increased fuel consumption. I have the 3.55 gears- 3.73 owners might need to run 5th when towing.
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Old 04-16-2014, 09:15 AM   #75
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Originally Posted by Mark S View Post
I have a 2011 F150 Ecoboost 4x4 with 373 gears. When I first picked up my similar weighted Work and Play trailer and towed home at 65-68 mph I got 7.5-8 mpg. I hated my truck and was ready to trade for a diesel on the way home. I then read on this forum that when towing, 60 mph seems to be the magic number. I slowed to 60 and my milage went up to 10.5, an almost 25% increase.

I always think I may want a diesel but with what I am towing and the cost differences I just can't make the costs justify the change. Try slowing to 60 (and it is hard as the Ecoboost really wants to go faster) and I think you will see a big difference.
I know what you mean. I have the same issues with mine (except I've never hated it). It wants to pull fast. I have the same truck except XLT. I'm going to try real hard this year to slow down because I'm also at the 8 MPG. Wish me luck! I got brand new tires on too.
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Old 04-16-2014, 09:17 AM   #76
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Dang, I've not seen a new truck like that under $50k in a long time, you stole it! I just built one online and it came in at $55k with just the base LT package and the Duramax engine, which is $8,299 with the Allison.

Second, diesel is only 15 cents more per gallon there? It's always 40 to 50 cents more than 87 octane here. Is your diesel cheap or is your gas expensive?
Sticker on my truck was just over 54,000. Moderately equipped LT.

I meant to type 15 percent more. Not cents. Either way, my increase in mileage of 50 percent means I'm saving on fuel.

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Old 04-16-2014, 09:35 AM   #77
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I am looking at a 2012 Dodge Ram cummins. After reading about the DEF, it makes me wonder if i should try and find a '06-07 5.9 cummins without all of the egr, and DEF stuff.
The 2012 Rams were the last year that they didn't have DEF. I can't speak to EGRs, though.

The Rams introduced DEF in the 2013 model year.
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Old 04-16-2014, 10:17 AM   #78
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Sticker on my truck was just over 54,000. Moderately equipped LT.

I meant to type 15 percent more. Not cents. Either way, my increase in mileage of 50 percent means I'm saving on fuel.

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Very true that you are saving on fuel while towing. The more you tow the more a diesel makes sense. For the average owner driving say 15K per year and towing maybe 1K of that, you only get that 50% increase in mileage on 8% of your driving, though. If you drive 15K per year and are towing, say 10K of it- now you're getting somewhere with that additional towing mileage.
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Old 04-16-2014, 10:19 AM   #79
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The 2012 Rams were the last year that they didn't have DEF. I can't speak to EGRs, though.

The Rams introduced DEF in the 2013 model year.
Ep,

What year model is your Dodge? I have heard that the Dodge 6.7's got very poor mileage (unloaded, in particular) until they went to DEF. Maybe more regens eating up fuel? What was your experience?
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Old 04-16-2014, 10:32 AM   #80
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Ep,

What year model is your Dodge? I have heard that the Dodge 6.7's got very poor mileage (unloaded, in particular) until they went to DEF. Maybe more regens eating up fuel? What was your experience?
2012. My fuel mileage isn't great - generally 12-13 around town. We've hit 14-15 on non-towing highway tanks but don't do them all that often. I have the 4.10 gears in mine; crew cab; long bed.
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