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Old 09-10-2014, 07:31 PM   #1
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Gas or diesel

I have decided that the F150 I have is just not going to cut it with the trailer I have. Have an opportunity to get a pretty good deal on some 2015 350 Super Duty trucks coming available in a couple of weeks with very low mileage on them. Some are 6.7 diesel and some are 6.2 gas. Are there any here who have the 6.2 gas in a 350 Super Duty and how are the real numbers for mileage and power. I realize the diesel is going to have a lot more power however the price different is about $10,000 and the cost to service, repair will be less as well.
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Old 09-10-2014, 07:37 PM   #2
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that's a huge price difference for used. It isn't that much of a gap for new. As far as repair cost, everything is expensive these days. Keep in mind, that diesel has a life span 2-3 times as long, so of course you will spend more over time. You will get at least 50% better fuel economy with the diesel, and twice the torque for pulling.
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Old 09-10-2014, 07:51 PM   #3
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You will get at least 50% better fuel economy with the diesel,
Certainly not my experience. I didn't see any improved fuel mileage going from gas to diesel. I do agree that you get more power, but depending on the load, a gasser may provide sufficient power.
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Old 09-10-2014, 07:55 PM   #4
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I went from 7 to 12 MPG and that was with upgrading to 4000lb heavier trailer at same time
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Old 09-10-2014, 07:57 PM   #5
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I went from 7 to 12 MPG and that was with upgrading to 4000lb heavier trailer at same time
That's amazing. Wish I could say the same.
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Old 09-10-2014, 08:01 PM   #6
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Keep in mind, that diesel has a life span 2-3 times as long,

I Don't drink this Kool-Aid myself...especially with all the emissions crap the manufacturers are required to put on diesels these days. Modern gas engines are extremely reliable.


As to price, when I bought my 04 Duramax truck in 07, a diesel engine added $6000 to a used vehicle (all else equal) but only $5000 for new trucks. A diesel on a new truck is now about 8-9k, so I would believe $10 for used late model....It's supply and demand at it's finest.
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Old 09-10-2014, 08:07 PM   #7
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It all depends on how much you will be towing the trailer. Full timers tow more than vacation campers. Will the savings in fuel offset the $10,000.00 for the diesel? Check the towing guide for the gas truck. It needs to be 20% more than the trailers max weight.
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Old 09-10-2014, 08:09 PM   #8
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I just built a truck on Chevy site. $8000 upgrade for Duramax/Allison upgrade. At 200,000 miles, a diesel will be worth almost that much more than a comparable gas truck. Resale value will always be better.
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Old 09-10-2014, 08:12 PM   #9
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You didn't say what you are pulling..so its hard to say. How much will the truck be used other than as a TV?
I just upgraded from a F150 5.0L and pulling a 7000# straight pull, to a 2013 F250 6.7 and a 9000# FW. The 6.7 is flat out awesome. The F150 would get about 18mpg regular driving.....about 9.5 pulling. The 6.7 gets 11.7 pulling a bigger trailer.....and 19.5 general driving.

Plus' and minus's to both. Get what makes you feel good!
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Old 09-10-2014, 08:16 PM   #10
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You didn't say what you are pulling..so its hard to say. How much will the truck be used other than as a TV?
I just upgraded from a F150 5.0L and pulling a 7000# straight pull, to a 2013 F250 6.7 and a 9000# FW. The 6.7 is flat out awesome. The F150 would get about 18mpg regular driving.....about 9.5 pulling. The 6.7 gets 11.7 pulling a bigger trailer.....and 19.5 general driving.

Plus' and minus's to both. Get what makes you feel good!
I just realized that I forgot to add the trailer. It's a 3008 windjammer 7220 dry so in the 8500 to 9000 lb plus other stuff in the box. Yes it would be used for daily driver as well in Alberta.
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