My 08 diesel with 525,000 miles runs great, smokes a little while warming up. I start her up and let her idle for 10 minutes before I get going. The first quarter mile theres a bit of blue smoke behind me and a little slow shifting. But after that it looks good behind me all day. I've only had my van about 1300 miles but oil consumption seems to be almost a quart every 150 miles. I could be a little off on my calculations but not much. Once I got her home I changed the oil and today I've just finished off my first 4 quart jug of Rotella. At this rate I'll never need to do a full oil change,, just a new oil filter every 10,000 miles.