Just got my first diesel looking for some help from the experts. Its an 02 chevy express 3500 with the chevy 6.5 I was told. Its a 14ft box van conversion into a mobile race shop for my motorcycle business not that it matters but just so you know what were working with. Just drove it from NY to MI getting about 10mpg. Don't know much about diesels but have always heard you can throw a few parts at it and get some better performance and most importantly mpgs. Anybody have experience with this one or know what are the best options to go with? Trying to keep the cost down but open to ideas because i will be putting a lot of miles on it. Thanks!