Castrol GTX Synthetic Engine Oil 5 Quart for $20

Autozone is offering Castrol GTX full synthetic engine oil in a 5-quart size for $20. This drops the price from the typical $30, representing a 33% discount. The deal provides protection for up to 10,000 miles between oil changes, and the product meets or exceeds multiple industry standards including API SP and ILSAC GF-6. The deal is popular with over 700 views, indicating solid interest. The price drop is notable, especially considering the quality and specifications of this synthetic oil, making it a good opportunity for vehicle owners to stock up.