Ultimate Catch Can Reference

[Stubek]

Cool writeup.
Do you need to drain or empty the catch can periodically? Just do this with your regular oil change?

[jimrobbington]

Cool writeup.
Do you need to drain or empty the catch can periodically? Just do this with your regular oil change?

Yes. It will fill with nasties that should be emptied. Some cans come with dipsticks/windows to see how full it is. Others you just have to guess. Winters they will fill up with more moisture, so you must check it often so it doesn't freeze and cause problems.