Originally Posted by pdrayton

I read that the oil turns black quickly becuase the additives change color when they are heated. If the oil didn't have additives it would still be clear.

I'm looking at putting a frantz on my ol' 240D, but I don't like the drilling holes in things part of it all. Is it not possible to do this all in a reversible way? I guess not, duh, otherwise you guys would have done it.

Anyway, just looking for confirmation that TP is the way to go. Thanks for sharing the results.