Oil replacement is one of the vital parts of owning a car. You need to do that periodically so that the engine of your car can operate without any problem. Otherwise, you will end up with so many broken parts. It may even cost you a car. The importance of engine oil is obvious. All car owners should pay for oil when the time comes. Repco Catalogue is a good source to find some half prices on major brand oils like Nulon, Castrol, and Valvoline. Castrol GTX ultraclean 15W-40 5L will be 55% off. Repco oil sale with so many different oils is available on pg 2-3 and pg 4-6. You can also win $50K in cash with your purchases.