We just sold our 2006 F350 SD turbodiesel 6.0L (crew cab, dually, LB), it ate us up in repair costs! Turns out (watch the Bulletproofing video) that engine had 4 subsystems that are (now) known to be a problem. The dealership diesel mechanic called me and asked if I ran errands in the truck, and stressed that one needs to "get on it" with the 6.0L engine, or it "cokes up" and must be cleaned out. $15K in repair bills was enough! We just bought a 2015 F350 Lariat gasser.