WM has both on roll back where I live within pennies of each other ... The Castrol Edge 5W30 touting 20K mile protection while the M1 EP 5W30 staying with 15K mile protection .
I figure both are good for between 10K ~ 12K mile OCI under normal mixed driving conditions . *The M1 site shows the 5W30 EP to be rated for D1 / Gen 2 while the Castrol site did not show D1 / G2 for the Edge 5W30 EP (yet it is rated for 20K miles) . What gives ? Admittedly Castrol's web site is such that I'm never sure with geographic site I'm looking at ... Besides marketing , does one have a better add pack or base oil or do you just pick based on what's available to read (i.e. marketing / PDS sheets) ? Lastly , has anyone seen a UOA on either 5W30 oil out to 15K ~ 20K miles ? ... In mixed driving conditions I am curious how these two EP oils degrade versus say regular M1 5W30 or Edge 5W30 ?
I figure both are good for between 10K ~ 12K mile OCI under normal mixed driving conditions . *The M1 site shows the 5W30 EP to be rated for D1 / Gen 2 while the Castrol site did not show D1 / G2 for the Edge 5W30 EP (yet it is rated for 20K miles) . What gives ? Admittedly Castrol's web site is such that I'm never sure with geographic site I'm looking at ... Besides marketing , does one have a better add pack or base oil or do you just pick based on what's available to read (i.e. marketing / PDS sheets) ? Lastly , has anyone seen a UOA on either 5W30 oil out to 15K ~ 20K miles ? ... In mixed driving conditions I am curious how these two EP oils degrade versus say regular M1 5W30 or Edge 5W30 ?