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Silverlsinva · 06-11-2013, 01:04 AM

My dad has the 8.1 in his 2500 hd truck and it has 77k miles on it and no problems from it but his does have the Allison tranny in it as well. But It does suck some gas I think he gets 10mpg avg.

06-11-2013, 01:04 AM	#4
Silverlsinva Drives: 2013 Fiat 500 Abarth Grigio Join Date: Apr 2011 Location: Manassas, Va Posts: 3,124	My dad has the 8.1 in his 2500 hd truck and it has 77k miles on it and no problems from it but his does have the Allison tranny in it as well. But It does suck some gas I think he gets 10mpg avg.