Break-in oil, is it really necessary?
All the manuals I've read while rebuilding my 74 240d engine seem to mention using a break-in oil for the first 500km or so. Is it a good idea to do this, and if so, what might be a good break-in oil?
Actually, maybe I should also ask the basic question of just exactly what is a break-in oil?
Thanks for your replies
1969 220D w/240D engine