But, that's not all a great filter does—optimizing your oil flow is also part of the job of these RX8 oil filters, so you get a potent flow of oil to keep your engine's gears well lubed and wear free. These bad boys also boast a lubricated inner seal that gives you extra protection against leaking, but slips off easily on your next oil change. When you add on our AutoAnything 1-year lower price guarantee, plus free shipping and long life warranties, you've got the sweetest deal anywhere!