I just bought a GMC w3500 (isuzu NPR) flatbed. I haven't had it long enough to get a read on mileage, but the landscapers all love them. I usually buy Ford diesels, but for the cost, these things are a value. Mine is a 2001 in great shape. I could have bough three of them for what I would have had to pay to go with an f350 flatbed diesel.