Well that may be no difference at all. But lets say they they went from 88% Group II Basestock / 12% Group I Carrier & Additive Package to 85% Group II Basestock / 15% Group I Carrier & Additive Package with the additional additive being mostly Calcium. However Im still hoping that the "Deposit Shield" will turn out to be a very small addition of POE to keep the engine squeeky clean. I really like the idea of abuilt in ARX type maintenance dose of POE.