Glad to be here

[thz71]

I can personally garunteed you you never see 30 mpg from a 6.5

 

[Scrufdog]

The best I've seen from my 97 6.5 is about 18mpg. Thats with 4" exhaust, Heath Diesel PCM, 14PSI boost, advanced injection pump, new injectors, marine intake, intercooler, relocated FSD with #9 resistor, and other misc mods.

What year is it? If it has the DS4 pump on it, start saving up for a FSD/PMD module with a relocation kit, if it doesnt already have one. These are equivilant to the ignition module for a gasser. Stock it is mounted on the side of the injection pump and the heat soak from the engine kills it, as well as the poor design in general. So far my Heath Diesel relocator and FSD module have been doing fine for awhile.

If you need anything and I dont see your post feel free to PM me, I know a bunch about these things. Owned mine for 10 years, do all my own work, except for the reprorammed PCM.

 

[95C1500]

I don't think BJ even saw 30 mpg with his 6.5...

Welcome by the way

 

[thz71]

I don't think BJ even saw 30 mpg with his 6.5...

Welcome by the way

He definitely didnt

 

[polar]

Wirh everything great white has done I don't think he has seen north of 21 yet


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[95C1500]

I think he reached 22 IIRC. maybe... who knows...

 

[thz71]

Anyway it's nowhere near 30

 

[cjman250]

you might get 20 at the most, but not 30

 

[Big D]

so is getting 30 mpg out of a 5.9 cummins pretty common?

 

[DieselMike1]

Welcome. If your looking for 30 mpg your going to be disappointed.