AutoZone.com: Castrol GTX Synthetic Blend Motor Oil Only $1 + FREE Shipping

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Hop on over to AutoZone.com where you can score a sweet deal on Castrol GTX Synthetic Blend Motor Oil. You can score 5W-20, 5W-30 or 10W-40 for just $1. Even sweeter, shipping is free or get FREE 2-day shipping through ShopRunner (sign up for a FREE 30 day trial here).