Real World MPG - Heavy Duty Gas Burnner

[Dale Moser]

The Cummins inline 6 reigns supreme. Over 20 and 16-18 towing.

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On real diesel. I could get 23 before they took the sulphur out of the fuel.


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[Box-R]

5.9 Cummins

My 2005 Dodge 2500 gets 21+ avg and has about 230k on the odometer.
Warranty replaced one of the ignition modules early and I replaced a cracked injector line. That's it, no other repairs ever.

[Keith]

Chad E

Thanks for the info. I'm trying to decide if the cost of a diesel is worth it.

I don't tow often but I put a lot of miles on a truck. Just trying to figure out if the increased MPG is worth the extra money.

Have you considered a Chevy or GMC 1500 with a 3.0 Duramax? Some people are reporting over 30 mpg on the highway, with most everyone getting mid 20's+ MPG. They are rated to tow roughly 9000 pounds, but really should be kept to 7,000 pounds or less.

[ateagleton]

Based on $3.71 unleaded and $4.74 diesel… if you get 12 mpg average on gas and 18 mpg average on diesel (under and over estimates likely) it would take 183,000 miles to recover the $11,000 cost difference. This also does not account for cost of DEF and higher oil changes. But also does not account for the significantly better resale value of the diesel.

[Palmetto]

My dad just made the switch. 19 6.7 f350 4:10 dually to a 22 7.3 f350 4:30 dually. He hauls pretty heavy all the time, and says he can't really tell a difference so far. Says he likes it. Mileage is too close to worry about, fuel is cheaper, and Doesn't use hardly any DEF....LOL


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[Mambajeep]

2021 F250 Tremor 7.3 4.30 gears. 13 on the highway, 13 in town. Really enjoy driving it

[captainsling]

The diesel is about a $8k upgrade from the 7.3. He's not asking about diesels.

[CabezaBlanca]

The diesel is about a $8k upgrade from the 7.3. He's not asking about diesels.

8K will buy a whole lot of gas!

[TeamAmerica]

The diesel is about a $8k upgrade from the 7.3. He's not asking about diesels.

We never miss an opportunity to answer a question that wasn't asked here at tbh!

Now I like to answer a question with a question! Like why OP needs more than a half ton truck? We need some more facts first!

[RPB]

I’ve got 700 miles on mine f350 3.73 I’ve only run back and forth to town and country roads and lots of pasture miles. Hauling hay bales. It’s been steady climbing but today it went over 11 up to 11.2. I’ve not reset it since I drove it off the lot. Have not done any miles on the open highway with it and have not run it in any mode but normal. Hoping to eventually end up around 12-13 but the added weight of a flatbed will bring that back down probably. Regardless I didn’t buy it for the fuel mileage

[bbqfan5909]

Have a 3.0 duramax, 30 mpg happens when your under 80 and wind is at your back. 24 city and 27 highway is what I see consultant, and changing oil is simple and $56 doing it myself.

The LZ0 3.0 duramax is suppose to be more power and tow 13,000.

Have you considered a Chevy or GMC 1500 with a 3.0 Duramax? Some people are reporting over 30 mpg on the highway, with most everyone getting mid 20's+ MPG. They are rated to tow roughly 9000 pounds, but really should be kept to 7,000 pounds or less.

[Choppa311]

How many miles per tank are y’all getting on the 7.3 gasser F250s?

[TX03RUBI]

How many miles per tank are y’all getting on the 7.3 gasser F250s?

Right around 400 with a short bed crew. I don’t drive til E though. Typically fill up around 50-70 miles before E.

[bowfishin fool]

How many miles per tank are y’all getting on the 7.3 gasser F250s?

I have the 48 gallon tank, I fill up at about 500 miles or 1/4 tank

Computer says I can make 625-650, but I try not to get that close!


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[Mambajeep]

Right around 400 with a short bed crew. I don’t drive til E though. Typically fill up around 50-70 miles before E.

Same for me 400-405