Question:My engine uses oil. I'm always adding oil so
why should I ever change it?
Answer:You should still change your oil and filter periodically
to get rid of contaminants and sludge that build up in the crankcase.
Just because your engine uses oil doesn't mean the oil that's
in it stays clean. It doesn't. It gunks up just as fast as the
oil in an engine that doesn't burn oil. In fact, it probably
gunks up faster because of increased blowby due to the worn pistons
and rings.
If you never change the oil, sooner or later the filter will
plug up. And once that happens, you've lost all protection against
dirt and abrasives. Before long, the bearings will become worn
and you'll hear the rods knocking. Keep driving and something
will eventually let go. End of engine. End of story.
