Quote Originally Posted by speedyfix View Post
synthetic oil, by its very nature, will reduce wear on moving parts. on new engines, you want everything to wear evenly since you're breaking it in. it's ok to use synthetic oil but what will happen is that breakin will take longer.

the duration of the breakin differs, here pwede shorter since most of the time cars are in traffic. 1000kms for gas engines and maybe 4-5000 kms for diesel.

however, with the better tolerances and clearances of engines straight from the factory, synthetic oil is becomming more and more common as the factory fill (benz, porsche, bmw, etc) kaya this will not hold true for much longer.

hope that explains it

o i see. thanks.