Glow plugs are high $
The cost is more for parts but they last longer in diesels. My oil changes are $115 but I only do them every 10,000 miles not 3 or 5,000. Glow plugs should last years...I have all previous records for my truck and they had never been changed until 3 months ago...one morning when I started it the check engine light came on...turns out when one glow plug goes bad you just do them all and the harness' as well...labor included $689 not bad really considering they went 187,000 miles good deal really. Paul7 yes they do make 1/2 ton diesels (F-250,C2500 Ram 2500) they don't make a 1/2 ton diesel SUV though the Xcursions are based off the F-350 chasis. As for the mileage 20+ for diesels is average on the Hwy a bit less in town. The big gas SUV's get WAY less....V-10 X's get like 13 Hwy unloaded and like 10 loaded the mileage thing is why I just went big with the diesel. Like I said to if you do look at X's only look at 2000-2002,I spent three months looking for mine. Funny thing to is that the really low mileage ones are still $25,000 or more. You should by able to find a 130,000 mile one for $15 to $18,000 with all the goodies done...lift kit,shocks etc. Take your time don't rush do research and you'll find what you like we all have different needs,wants and likes.