Quote:
Originally Posted by TTAM
MPG on the dash. I reset my trip odo and the mpg every time after I filled up. I usually fill up a little less than 21 gallon at the pump and the distance I traveled is usually between 400-420miles. At the same time, the OBC reads 19.6mpg most of the time. So the actual gallon pumped in vs the actual miles traveled matches with the OBC mpg number. ...
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The closest comparison would be the diamonds on my graphs. These are mpg = (miles driven / gallons to fill the tank).
As you can see we got better mpg in the late summer & fall running summer diesel than when it got colder and running winter diesel, even though we were still in the break in period where the mpg was getting better with each tankful last fall.
All of your miles have probably been running winter diesel during the break in period. So maybe 19-20mpg per tankful is OK. FWIW I wouldn't be too concerned unless your mpg did not improve quite a bit this spring.
Funf Dreisig
p.s. the very low mpg/tankful diamonds include significant towing (distance and/or heavy loads e.g. 2 tons). These tankfuls are also included in the mpglong curve. But none of the winter tankfuls include significant towing.