Quote:
there is no possible benefit to not replace it. Sure you can save yourself a couple bucks and get a meal at McDonalds and thats not good for you either.
It's not left in use to save a couple of bucks.
Any savings is coincidental. Someone may be using a $6 filter over two OCI's where a $3 filter would work.
It's a mismatch (in some cases) between filter life and oil life.
The service, basically, dictates how long your filter lasts.