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Old 12-28-2011, 06:21 PM   #11 (permalink)
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Join Date: May 2009
Location: Charlotte NC / SC
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1 Ton - '94 C3500
90 day: 19.7 mpg (US)

Big White Brick - '03 Express Van
90 day: 15.19 mpg (US)
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I have had this happen from old fuel.
Diesel also comes in different Cetane grades, but that usually causes poor idle and slight loss of performance.

My bet is on old fuel with excessive water in it. I use 'Pri-D' on every fill. PS is good and available at most truck stops.


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I can't understand why my MPG's are so low..........
16000lb, 41' Toy Haulers are rough on FE!
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