Mpg on deleted 2500 towing

[BrownieNpadre]

Thinking about getting out of my hemi and back to a diesel. Any average on mpg when towing a 30’ TT with a deleted Cummins?

I definitely understand the other upside and the variables, just wondering what I could expect in average mpg?

 

[AH64ID]

Probably pretty close to a non-deleted one. They don’t use much for fuel for regen when towing and the stock programming is pretty good for economy. Maybe 5-10% bump, but that’s all I’d really expect to see.

My 05, 18, and 22 all get similar mileage towing. All had similar power and the 05 was not stock, so it did better on mileage. Stock for stock the 05 got the worst mileage of the 3, but still good.

The only time mileage really drops on the 6.7’s is slow speed towing with the torque converter unlocked.

 

[BrownieNpadre]

Probably pretty close to a non-deleted one. They don’t use much for fuel for regen when towing and the stock programming is pretty good for economy. Maybe 5-10% bump, but that’s all I’d really expect to see.

My 05, 18, and 22 all get similar mileage towing. All had similar power and the 05 was not stock, so it did better on mileage. Stock for stock the 05 got the worst mileage of the 3, but still good.

The only time mileage really drops on the 6.7’s is slow speed towing with the torque converter unlocked.

 

[BrownieNpadre]

So what you getting at 70 mph on average?

 

[AH64ID]

So what you getting at 70 mph on average?

9-12 depending on winds and terrain. Usually 10-11.

 

[BrownieNpadre]

9-12 depending on winds and terrain. Usually 10-11.

So my hemi is not so bad then at 9-10.

 

[AH64ID]

So my hemi is not so bad then at 9-10.

Where do you do most your towing?

I tow around the inner mountain west. I would expect slightly better mileage in flatter country.

 

[BrownieNpadre]

Only texas so far.

Where do you do most your towing?

I tow around the inner mountain west. I would expect slightly better mileage in flatter country.

so

 

[AH64ID]

Only texas so far.

I’d except it to drop in different terrain.

 

[Greenhills]

Well..

You certainly won't recoop the cost of the delete via the fuel savings, i'll tell ya that much.

 

[H3LZSN1P3R]

Well..

You certainly won't recoop the cost of the delete via the fuel savings, i'll tell ya that much.

For sure you will especially with these high diesel costs i have gained a hand calculated 25% increase ~4.5MPG from stock to deleted was seeing AVG 18-19 before now seeing AVG 23-24. Towing i only saw 1 mpg increase but still with the unloaded savings i will recoup my money in short order with the millage i put on.

Now the difference between a intact tuned truck and deleted is minimal ~1 MPG difference so if you are not having emissions issues i would stick with the intact tuning. As its less cost and you will recoup the money no issues.

 

[Firebird]

M

So my hemi is not so bad then at 9-10.

My 6.4 Hemi couldn't do that pulling a similar sized TT, and I'm in flat Florida

 

[BrownieNpadre]

What you getting? Maybe I am wrong

 

[MEGA HO]

What you getting? Maybe I am wrong

You're likely comparing apples to oranges, what someone else gets with their 30 footer could differ greatly from what you're getting unless you do the test with same (similar) trailer profile/weight/terrain/weather, etc...
One thing is certain is diesel will do better than gas, can't tell by how much but better.

 

[Firebird]

What you getting? Maybe I am wrong

It usually got between 7 and 8 mpg. My TT is 35' and I now have a Cummins

 

[CaptainMike]

I'm on the last few days of a coast to coast and back again trip with my 22 3500 w/6.7/AISIN towing a gvw 12k lb 5th wheel and I'm right at 10 mpg for the whole trip.