Quote:
Originally Posted by bgkast
The 27s seem more reasonable. The 30-something could have been a fluke, or an error in measurement of fuel volume (not all pumps cut off at the same point). Not too shabby though…
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The only time I've gotten 30+ MPG was a complete fluke. I filled up at the worlds slowest fuel pump (as in it took 30 mins to fill up 1/3 of a tank... seriously). Probably ended up with like 26 gallons in my 21 gallon tank (went to the filler neck with **no** foam). IIRC, I got over 700 miles on that tank. Went from Gallup, NM to the other side of Oklahoma City
. I think it was something like 36MPG at 70MPH because when I filled up at the next stop it filled to the normal amount.
I second the 27s as being reasonable. On that same trip with the cruise at 60 I got 28. With the cruise set at 70 it was around 26.
All these numbers are for my '79 SD. I get 28-29MPG at 80-85 in my 2.5T
