well it all depends on what type of oil you are using. i guess the mobile 1 filter is good for regulat oil but for synthetic i think you have to use a different one. right now i use the toyota filter an it's only $5 with the oil change. but i'm going to switch from toyta oil to Redline next time, so does any one know which type of filter would be best for use with Redline racing oil (Synthetic) i was thinking the Redline filter but i don't know.