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· Hi, I'm Earth. Have we met?
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I say Diesel, With the amount of towing you say you plan on doing, the gas milage of the 8.1 will hurt! THe 8.1 will run very close to the same as a stock d-max so really the only diff will be milage. THe maintence will be a little higher on the dmax as it hold 10qt of oil compared to the 7Qt of the 8.1. THe fuel filter is about three times the cost and need replaced every 10k minimum, and the trans filter needs changed often about 7 to 10k miles but this is allison related not diesel!!

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