 Now through December 28th, Castrol Edge and Edge High Mileage Motor Oil are on rollback at Walmart. Claim based on sequence dine test under high load conditions versus API SP test limits. I've been talking about this company and CarPro trusted product for over 20 years now, and it's called Tiger DV. That DV stands for diminished value, and these guys are the ones you need to see first before filing an auto insurance claim. Their process is simple, transparent, and proven.