This link is further proof of the pressures being put to the automakers to make even higher tech,cleaner running,and more fuel efficient engines.
GF-5 is already obsolete in my opinion and we will need far better motor oil standards to meet these governmental pressures for lower emissions and less greenhouse gases.
Dexos is a step in the right direction,and any premium Group IV/V synthetic already meets or exceeds those standards like I have been saying in all those other threads. Even the group IV synthetics will be improved where and when needed.
These new standards justifies what I have been saying all along!!
Better emission standards must equate to better lube standards to match the higher tech engines,hence the reason for dexos.
Further info showing GF-5 may not be the best standard,and this could be what has led to the dexos standard.