Ive had about thirty benzes, mostly diesels and driven them maybe a half million miles or so and most were pretty well worn when I got them....I think the lowest mileage was eighty thousand.....
I have never used any diesel purge yet. I have bought some new or rebuilt injectors before but I don't think I have ever been able to tell much difference between the performance of new ones over the old ones.
I use a bit of diesel injector cleaner from time to time and a bit of marvel mystery oil in my fuel though. And in the winter if I think of it I will run a little diesel antifreeze in the fuel from time to time.
Tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.
[SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.