Hauled a dmax this weekend

[Grindem]

Well I had the opportunity to haul a duramax to a pull this weekend. We rolled across the CAT scales and weighed 21,650. The load pulled just fine but the mileage sucked. I have never been one to lie about my mileage so here goes: 1st tank-8.3, 2nd tank-7.4. It was about a 500 mile round trip, with several steep hills and we ran 70-80 most of the time. The temp Friday afternoon was 95+ I was real impressed with the power, I turned the truck back to stock, but the mileage wasn't great. I'm not suprised though I have never believed guys getting 15+ while pulling big loads.

[stump0331]

wonder how much better the milage would have been running maybe 55-65

[forddieseltweek]

I no that when i am towing, I get better gas milage at 75 then 55-65. I crossed the scales at 18,500 and was pulling the hills with the cruise set at 75. If i try to do 55-65, 4th gear runs rpm up to about 3000, 5th gear is to high at that speed. 75mph in 5th gear at 2600rpm is about perfect......

[fulloutpwr]

I always tend to get better gas mileage @65 then 75 or 55 when towing a large load. My last load was a 10,457 lb boat and I sat at around 11mpg and had many large hills, slow curves on back country roads, etc.

[Grindem]

I was headed up I-44 toward st. louis, I might have got better mileage going slower, but once I get a load rolling I like to stay in it.

[Hillbilly Deluxe]

last load i hauled was 2 polaris 750 jet skis in the bed and a 42' donzi the boat intself is over 12,000 lbs i filled up in santa fe springs,ca drove to havasu city and back (about 600 miles) then drove arond town all week on 1 tank (40 gallons, trip meter read 860 something at next fuel stop) i cruise about 1800-2100 rpm the entire time i get better milage with the toys then my buddy's hemi empty but thats why i luv my psd

[TwinTurboStroker]

Yeah I've gotten way better mileage, 13-16 when, I was doing 65-70 while towing, but with all that power right there on the go pedal, its hard to resist!!!

[TYREBOYS_DEMAXIN]

it musta been all the power on the trailer that slowed you down and kille your fuel mileage..J/K.

[Grindem]

Originally Posted by TYREBOYS_DEMAXIN

it musta been all the power on the trailer that slowed you down and kille your fuel mileage..J/K.

LOL

I keep my foot in it and roll on, none of that p#ssy footing around. I was just curious what others had for mpg's when pulling.

[TYREBOYS_DEMAXIN]

Originally Posted by Grindem

LOL

I keep my foot in it and roll on, none of that p#ssy footing around. I was just curious what others had for mpg's when pulling.

i know what you mean..it depends on the driver mostly but it varies truck to truck also..with 15k pounds of hay on my demax dually i still got around 14mpg runnin 60mph on the highway but that was with some extras on it,back when it was stock i was around 11mpg with the same load..