I think you forgot the most important calculation in new vehicle math: RESALE. A diesel truck with 80000 miles that sells for $3000 more than a comparable gas truck means the diesel only cost $2000 to buy. NOW do your math of higher cost fuel per gallon, more expensive oil and filter changes, etc. Then deduct 50% better fuel economy (I figure to save $.05 per mi.). After all that try to pull a gas truck with a 30 ft gooseneck up to a gas pump, there's never enough room. I've done all these, owned a new big block gas, and love my diesel