I bought up a stash of 0w20 and 5w30 Napa synthetic during their sale late last year and will run the OCIs out as far as I have been with M1, PP, QSUD or any of the other synthetics I've used in the past...and I'll sleep well at night doing so. 
FWIW, I plan to run the 0W20 to 10K miles (recommended OCI in my 2012 Toyota Highlander). I'll run the 5W30 out to 7500 miles in my 2002 Tacoma, which is what I've done with every other synthetic oil since I bought the truck new.
If it isn't *identical* to Valvoline, it is close enough for me.

FWIW, I plan to run the 0W20 to 10K miles (recommended OCI in my 2012 Toyota Highlander). I'll run the 5W30 out to 7500 miles in my 2002 Tacoma, which is what I've done with every other synthetic oil since I bought the truck new.
If it isn't *identical* to Valvoline, it is close enough for me.