Re: Flushing Oil additive
Yes the stuff is good. BUT:
FOLLOW THE INSTRUCTIONS TO THE LETTER.
This stuff significantly reduces the viscocity of your flush oil, so it can better hold fine particles.
Your bro should make sure the bottle he gets is CLEARLY marked as suitable for diesel engines.
If your oil is very dirty, you should seriously think about dropping your sump BEFORE the flush, to see how bad the disaster is and clean the mud out.
Most oil available these days is good at least for 5,000K's, so by "el cheapo" I mean something with a low $$ ticket -- Castrol is often very reasonably priced. And you should put an el cheapo filter in with your flush oil.