 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. As you know, summertime is here. And for most people, that means more activities, more golf, more biking, more of whatever you love to do. But if you're dealing with minor aches and pains, your more could become less.