Adam The number one thing I can say about Diesels- ALWAYS buy good fuel from a reputable place. As far as maintenance costs go oil and filter changes tend to be a little higher but the power and economy more than make up for it.Do not over-service the air filter. This will let dust into the engine and this will be costly. If you maintain this engine properly it should (almost literally) last a lifetime. Just a few thoughts that might help you out. Good luck.