Quote Originally Posted by Retz View Post
I know this has been discussed so many times before in this thread but I'll ask again. The main reason why some people change oil regularly at a short interval is to avoid the formation of sludge inside the engine. Having said that, is it bad oil filtering that causes the formation of those sludges? or is it the oil itself which at some point will degrade and sludge the engine? sa oil ba ito or sa filter?
answer of dvldoc few pages back.

Quote Originally Posted by crazy_boy View Post
dvldoc, speaking of sludge, is it safe to assume that sludge is from use of low quality oil + low quality filter?
Quote Originally Posted by dvldoc View Post
Folks we have our self a winner, You got it crazy boy, it's the number on reason for sludge, second is other contaminates like coolant. Some engines are just sluge monsters due to a bad design, Toyota's 1997 to 2002 for example.

If you use a low detergent automotive oil then you can expect to have a sludgy engine. If you have a coolant system leak expect the same. That's why it's always best to know what's in your oil, It's good to pull your valve cover from time to time just to check if everthing's good to go.