My goal on a VW Jetta TDI is a MINIMUM of 500,000 miles. I actually hope to keep it running approaching 1,000,000 miles. I am not a diesel mechanic.
But in another life, I was (among other things) an aircraft maintainance control officer both bombers and fighters and had a big fleet of ground transportation in support.
So I have an appreciation for the drill.
The right choice of oil is indeed very important. Since Amsoil has an extensive product line, the one specifically for diesels is the one/s to get. I myself have decided to use Delvac One 5w40 aka Mobil One Truck & SUV. I also am on 10/15/20k oil and filter change intervals.
Some folks have also taken to bypass oil filters, for even more extended changes and pre oilers, which in theory; structurally removes 50-80% of the wear due to metal to metal contact at start up.
The answer to the auto vs manual can be a bit tricky, but to cut to my chase, 5 speed manual. It has the capacity to go 300-500 k miles, but as you know, that depends on knowledge of an interesting diesel/manual quirk and of course, how the vehicle is driven. Almost any hp/torque modification, unless you are REAL careful in use, can result in decreased clutch life. So to my way of thinking this almost demands an upgrade to the clutch (either before or after you wear out the stock clutch
), if seriously long life is a goal.
On the same thought, if you plan to do mods then an automatic can take much more than the 5 speed manual. Of course the mileage and control is compromised.
[ November 25, 2004, 01:04 PM: Message edited by: ruking77 ]