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Old 09-08-2018, 02:01 PM   #29
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Depending upon how you drive - you'll get 8 to 9 mpg.

Subtract up to 0.3 mpg if running your diesel generator so your house A/Cs can run when driving.

Subtract 0.1 mpg for every mph you go over your sweet spot (most likely about 62 mph).

And subtract accordingly for driving like its a hotrod or if you waste money on getting it chipped thinking the extra HP is free.
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Old 09-08-2018, 02:16 PM   #30
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Quote:
Originally Posted by patobri View Post
My Monaco Cayman 2002 30' with cummins 5.9L 275hp does
10 mpg. I tow a (big) smart car
I have the same engine and get 10.3 mpg towing the pontoon boat. and 9 mpg with car hauler and bronco on it. 99 36' Itasca. very happy with it
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