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Russell Ashley · 01-19-2013, 11:02 AM

I've put well over 100K miles on an Isuzu NPR with a 14 foot box during the last few years and never got over 11 MPG, and I'm a conservative driver. It had a four cylinder turbo diesel and top speed was 72 on level road. You mentioned in a previous post that you were getting 9 towing and 13 unloaded, which is about what my son gets with a late model Ford diesel dually. My point is, I don't think you would ever achieve payback if you swapped to a diesel engine, either a 4,6, or V8, considering the cost to do it and the higher cost of diesel fuel.

01-19-2013, 11:02 AM	#98
Russell Ashley Registered User Join Date: May 2010 Location: Lawrenceville, Ga Posts: 2,640	Re: Big Bertha Build thread x2 I've put well over 100K miles on an Isuzu NPR with a 14 foot box during the last few years and never got over 11 MPG, and I'm a conservative driver. It had a four cylinder turbo diesel and top speed was 72 on level road. You mentioned in a previous post that you were getting 9 towing and 13 unloaded, which is about what my son gets with a late model Ford diesel dually. My point is, I don't think you would ever achieve payback if you swapped to a diesel engine, either a 4,6, or V8, considering the cost to do it and the higher cost of diesel fuel.