So far we are impressed with the new Peninsular 6.5 diesel in the old truck. About 27 mpg (imperial) and very good power. Maybe we need a couple more tires under it though?
Was just talking about how I miss my 6.5 suburban. It was a great everyday driver, and did all that I asked when towing. I had a big block before that got an average 0f 10 and the 6.5 burb returned 17-18 most the time. Hwy would be more. Still keeping my eyes open for another one. These new diesels are very expensive, and complicated.