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Old 11-21-2012, 08:39 PM
agent walker agent walker is offline
LawnSite Senior Member
Join Date: Feb 2011
Location: Sesser,IL
Posts: 416
I get 11.8mpg in 2004 isuzu npr hd 4cyl turbo diesel 20ft box . But I'm sure it needs valve set, so that may help.
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