I have been going from GA to NC and back for the last 4 weeks pulling an 8X12 enclosed. I Fill up in NC drive to GA empty, use the truck for the week and then fill up in the top end of GA after a bit of towing and I am getting about 12.8 MPG Last friday I do my normal and fill up in GA, I leave the station and the truck just feels better and the overhead is showing 15.5 MPG temp was up to as high as 190 and my fuel pressure run down as low as 6, After the first 100 miles the overhead started dropping down to 14.2 and the temp went back down to it's normal 170 ish range, Pressure came back up to 10. When I filled up in NC on the way down sunday I had a hand calculated of 13.8 I really did not do anything different just run a little slower. The odd part was the overhead going up to the 15 range, It has never done that in these trips. I did notice that the fuel was more clear then the Green it has been being.

I run Drews Brew in every fillup.


What should my operating temp be?


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sounds like your getting a fill of the ULSD stuff. and it is also quite chilly in these parts. so the radiator and intercooler are cooling more effectively.

I'd say it was just a change in weather.

 

If you're running up and down I-85 you can get anything fuel wise. Fuel and quality don't seem to get into the same sentence around this neck of the woods. That would be my guess.

 

I have been filling up at the Hess Exit 166 in GA on 85 and SC at Exit 10 on 26. I run through the truck stalls at both.