The local WalMart stocks Mobil Drive Clean and Mobil Drive Clean Synthetic Blend. They are both relatively cheap......$1.19 for the DC and 2.09 for the DC Synthetic Blend.......I read all the post on the Drive Clean on this board, but have not seen any posts on the DC Synthetic Blend. What are your opinons on both of these? Terry, what about any analysis you may have done on these oils? How are they compared to others? Is it worth the money to buy the SC Synthetic Blend?? Appreciate the info!!