Workhorse 8.1 liter poor fuel mileage
I have a 2005 Fleetwood Southwind 37c with the 8100 Vortec V8 with an Allison 5 speed transmission with 28000 miles that gets very poor gas mileage, about 6 mpg towing my boat or pickup and 7 mpg empt...
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You didn't mention your driving habits. Do you use you cruise in hilly terrain? That will cause a lot of downshifting of the trans and of course a higher rpm range which in essence eats more fuel. I average between 7 - 8 mpg and am happy with that. As far as keeping up with t a V10, you shouldn't be having any problem with that either all things being equal. Lastly I don't think we purchase these things for there fuel mileage. Good Luck, hope things pickup for you but seriously between 7 and 8 is going to be the best it will be.
