Okay. I think we will use the normal one, then after a distance, refill, use a tune, and hand calculate.

Okay. Great, then. But why does the thing show 19 mpg for the first day, then even if you reset the mileage thing later on the same tune, it shows 15 mpg on the second day?

I dont have the thing to update to the latest tune. Trying to convince the owner it would be worthwhile to spend the 32 bucks ...

We had a Predator 7130 thrown in when we bought a used 2004 Dodge Diesel pickup, the 24V Cummins.

When we put a mileage/performance tune in it, mileage around town shoots up to 19 mpg around town. Shut truck off, start in the morning, even if we restart the average fuel trip consumption thing, it ...

ropnjessi wrote: I remember when I installed the cold air box the milage shot up 2mpg, so thats a start..........

The mileage shot up 2mpg or the displayed perception of the mileage shot up 2mpg??

We installed the mileage/performance tune on the Dodge Diesel 2004 Automatic, and around town it seemed to get about 11-12 mpg, highway with trailer at steady 65mph around 15 mpg.

This was looking at the mileage display doodad on the ceiling console. And, yes, we made sure it was in US and not ...