Quote:
Originally Posted by deerefanatic
Ok, more details.
filled car up at the Shell in Centreville MI. Level concrete. Filled up to bottom of filler neck, NO FOAM.
1's top off, Marathon Station, Sears MI. Pump 11, Level Concrete. NO FOAM
2nd top off, same as above.
3rd top off, Marathon Station, Centreville MI. Level Concrete, filled to bottom of neck hole, NO FOAM
That is as precise as you can get folks......
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Approx. how many gallons did you put in each time? As nhdoc mentioned that does contribute to the amount of error in the reading (although I do think you can get close to decent mileage off of one tank). FWIW, I usually drive my cars to less than 1/4 tank before I fill-up. Almost always less than 1/2 tank.