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Did not read all replies, but did anyone mention that selector switch and mess up and start putting some fuel into the other tank? Mine did and went to the point it was over filling itself.
This could also explain less than adequate economy numbers or of course if the axle ratio versus speedo is incorrect.
I don't know how old your diesel is, but you could probably mix it with new fuel to "lessen" the impact of old fuel messing something up.
It was diesel from my white tank at my ranch and I dont know the exact time it was filled. I am proprobly going to end up draining it because it may have had red diesel in it fairly recently and I dont want a ticket for some bs. Thank you for the suggestion.
Did not read all replies, but did anyone mention that selector switch and mess up and start putting some fuel into the other tank? Mine did and went to the point it was over filling itself.
This could also explain less than adequate economy numbers or of course if the axle ratio versus speedo is incorrect.
I will look into it. Thank you for the suggestion.
silly question, but are you sure you filled up the correct tank? are you sure it was actually full when you started the 30 mile trip? fill up the tanks, drive a couple hundred miles (after an oil change) and check your mileage. i bet it is way better than 7.9. have fun! great starter truck
Im almost 100% sure I filled both tanks completly right before we started heading home. Thank you for the suggestion.
as the guys said, you can't go by the gauge. they are not very accurate. fill the tank, drive it for a bit, then refill it.
divide miles driven by fuel used for miles per gallon.
Did not read all replies, but did anyone mention that selector switch and mess up and start putting some fuel into the other tank? Mine did and went to the point it was over filling itself.
This could also explain less than adequate economy numbers or of course if the axle ratio versus speedo is incorrect.
this is cause by a bad diverter valve in the intank gas pump on gas engine trucks.
i never heard of it happening on diesel trucks.
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