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Senior Member
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2,035 Posts
Discussion Starter #1
Hey guys, haven't been around in a few years as I kinda got out of the diesels after having some massive problems with my 6.0L that left a bad taste in my mouth. That being said I think I'm ready to come back for some more.

Right now I've got a Silverado on a 6" lift and some 35's and the MPG's are killing me. I'm traveling back and forth to the camp (360 miles one way) almost every other weekend, and a lot of that is towing my trailer. Actually most of my miles are highway (over 70MPH).

Right now I'm averaging about 11MPG empty and when towing my trailer (18ft. with 2 polaris Rangers or my small 50hp tractor) I'm averaging about 7MPG. I've got buddies that have the new Dmax and the new Cummins rigs and they all claim they are getting 20MPG unloaded and getting about 15-16MPG pulling the weight I'm pulling.

So my question is really about MPG's since that's the driving force for me to even consider taking a huge loss on this truck I have now...now the Ford dealer tells me all day long their trucks get 20+ unloaded on the highway between 70-80MPH, but I want some real world numbers from some people actually driving the trucks.

Thanks in advance guys...
 

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Senior Member
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1,324 Posts
I don't know the mileage on the new trucks but just apply some simple calculations. If you tow 50,000 miles and ride empty 50,000 miles you will save about $12,000 or probable the cost difference not including the loss you say you will take. This is why they don't sit you down when buying a new truck and compare it takes about 100,000 miles to get your money back. But that doesn't include the extra maintenance costs.

50,000 miles at 8 mpg gasser and 16 mpg diesel
50,000 miles at 11 mpg gasser and 20 mpg diesel

3.00 gallon for gas and 3.50 for diesel just to make it easier. The prices are usually around $0.50 apart in my area.

I bought a used truck knowing full well I would never get a payback vs a gas but I like the power and abilities of a diesel truck. Sorry I can't help it with the calculations.
 

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Senior Member
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590 Posts
Your buddies are full of B.S .. I can put my hands on several new 12' and up fords,dodges and gm's.. Out of all these [friends and family owned] trucks, the only one that will hit 20 mpg is a ford 250 with the 3.31 ratio.. The truck is totaly empty most the time, and the driver drives according to the speed limits..You could coax 20 out of any of them if you really tried, but who's gonna run 55 on a 75mph highway? My 11' ford f350 avg's about 15mpg all around, and will do 16 pretty easy on straight highway runs..
 

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Senior Member
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2,035 Posts
Discussion Starter #4
I went and test drove one of the new Dmax's and drove it around town for a little while and was averaging 18.5MPG. Took it out on the highway and at 70MPH I was averaging 20MPG and doing 80MPH I was averaging almost 21MPG. This isn't hand calculated...just going off what the computer said. Even still that's better than what I'm getting now by a long shot.

When I'm towing to my camp there are 3 things that really bother me with my gasser:
1. With 7MPG and a 26g tank I have to fill up before I leave, stop half way, and then again when I get there. I hate stopping 3 times on a 400 mile trip, but that's what I have now.
2. When I'm here in Louisiana it's all flat and the truck easily tows in 6th gear my measly #8,000 load, but when I hit the rolling hills of Mississippi the truck is struggling it's butt off and aggravates me to no end hitting a hill at 75MPH and doing 65MPH or less at the top (unless of course I shift all the way down to 4th gear, get 3MPG, and let everything think my truck is about to explode).
3. Getting 7MPG towing #8,000 is costing me about $350 a trip to my camp. This year I've been going up there almost every other weekend so it's getting quite expensive.

When I do my average (computer calculated) driving around here for a week I get an average of about 12MPG. When I do an average of a months worth of driving (including going to the camp) that average drops to about 10MPG (sometimes less).

This is the big reason I'm considering the change.
 

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Old Fart
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889 Posts
Don't believe the Lie-O-Meters. They show "optimistic" mileages and not the true MPG's. I have seen them off by 1 or 2 MPG's.
 

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Junior Member
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3,533 Posts
Putting a 6 inch lift, and 35 inch tires on a unit is not a good idea if you are thinking about milage. I live in the mountains and have an LMM I get betweem 17 and 18.5 MPG US. I get a lot better milage than friends with 6.7 fords do. I can work on my truck without removing the cab. If I was buying a new truck, I would NOW look at a DODGE, or the GM.
I would put the Pac brake Constant velocity set up on the Dodge. The Ford has a usless exhaust brake, and that is important to me.
Just a thought!
 

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Senior Member
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590 Posts
I went and test drove one of the new Dmax's and drove it around town for a little while and was averaging 18.5MPG. Took it out on the highway and at 70MPH I was averaging 20MPG and doing 80MPH I was averaging almost 21MPG. This isn't hand calculated...just going off what the computer said. Even still that's better than what I'm getting now by a long shot.

When I'm towing to my camp there are 3 things that really bother me with my gasser:
1. With 7MPG and a 26g tank I have to fill up before I leave, stop half way, and then again when I get there. I hate stopping 3 times on a 400 mile trip, but that's what I have now.
2. When I'm here in Louisiana it's all flat and the truck easily tows in 6th gear my measly #8,000 load, but when I hit the rolling hills of Mississippi the truck is struggling it's butt off and aggravates me to no end hitting a hill at 75MPH and doing 65MPH or less at the top (unless of course I shift all the way down to 4th gear, get 3MPG, and let everything think my truck is about to explode).
3. Getting 7MPG towing #8,000 is costing me about $350 a trip to my camp. This year I've been going up there almost every other weekend so it's getting quite expensive.

When I do my average (computer calculated) driving around here for a week I get an average of about 12MPG. When I do an average of a months worth of driving (including going to the camp) that average drops to about 10MPG (sometimes less).

This is the big reason I'm considering the change.
let me put it to you in a real world comparison.. Both my brother inlaws have 3500 duramaxs[12's]. one is a extended cab one is like my f350, a crew cab.. all three are speced with auto's and 3.73 gears.. Traveling the same trip same load[ or no load] , neither of those gm's are doing any better then my Ford.. Best friend just bought a 13' dodge, same setup as my ford, but he got a 6spd manual.. Empty and trying, his best mileage is 15mpg.. The 08 just like it that he traded in[ -the emission crap] was getting `18mpg's..
 

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Senior Member
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2,035 Posts
Discussion Starter #8
Thanks for the replies guys. The Chevy dealer actually called me back and wanted me to come back in to re-negotiate my deal some more and I ended up getting a Duramax. I was going to go with the Ford because in my opinion I think they are a better looking truck and the interior room is really nice on long trips. In the end that 36g fuel tank was a big factor with me making long trips to the camp plus the dealer actually got me a better deal on an LTZ than I was getting on the comparably equipped Powerstroke.

I got a 4wd crew cab with the 3.73 gears and as of right now I put about 400 miles on the truck this weekend and I'm just a tad under half a tank (just barely) so I'm pretty pleased with that. According to the computer it says I'm averaging between 18-19MPG doing 75-80MPH and about 20-22MPG doing 55-60MPH. I don't know how accurate the computer is yet but I'll hand calculate when I run this first tank out.

Thanks again for the replies.
 

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Let it all Ride
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1,316 Posts
Wow, long time no see Hd_250. Some really bad things must of happen as you swore up and down in regads to your allegiance to the almighty 6.0. Hope all is well.
 
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