Yall do realize that diesels go a long ways before an oil change right? 5,000 miles is normal for a gas burner but a diesel under a load can go about 7-10,000 miles before a change but i go 15,000 miles in my powerstroke before i get an oil change, they say with the synthetic oil i use i could go 20,000 but i like to be on the safe side. My 08 has 14,280 miles so ill get the oil changed probably at the first of the year.

I'm not using syntheic oil, I think conventional at 5,000 miles will do all right.

The dealer told me to change it every 5k... Probably a little on the early side, but the oil has been changed every 5k, and its got 33k on it now with not a lick of problems, so I'll keep it up.

Well mine has 9500 on it and it just got its first oil change as I don't drive it that often. But I would say depends on conditions. If you drive a lot then change every 5-7500 or more based on towing, weather, etc.

i would say 5,000 miles

Once I reach 20,000 miles, I'll stop using regular oil & move up to syntheic ROTELLA & instead of changing the oil every 5K, as I've been doing with the regular oil, I'll change it every 10K with the syntheic !!!