You can see, in my response, that the additive levels are different. Part of that may be due to the ESP x2 product also being designed for diesel engines, which you can see in the approvals list.A fantastic set of responses! Thank you! My questions have been answered! I am much better informed now on how the oil testing business works. The only thing I am still perplexed about is why Mobil makes different 0W20 products for different markets.