We have an older Volvo WIA 1996 with a Detroit 11.1. Almost 750,000 miles. Love this engine. Plenty of power, and good fuel mileage. Average 10 MPG. 10 speed manual shift, Jakes. One of the best cruise controls I have ever used. Plus no emissions stuff. Not the prettiest truck out there, but pulls better and gets better economy that the 3/4 ton Dodge we used to pull with.