Dirty oil turns in to sludge, and the friction caused by sludge can cause your engine to lose power and efficiency, as well as generate extra heat that can cause damage to your various sensitive internal engine parts. The CJ's oil filter is designed to prevent the build-up of dirt and debris in your oil, keeping your engine working smoothly. For all your filter needs, AutoAnything provides the highest quality parts from the most trusted names in the industry, all of them offered with our 1-year lower price guarantee so you know you get the best prices when you shop with AutoAnything.