Originally Posted By: aquariuscsm
It's not rebottled Synpower. Here's what Ashland told me:
The NAPA Private Label Synthetic does carry a different formulation from our Valvoline SynPower. Though these formulation differences are not drastic, they are present. NAPA comes to Valvoline with a certain set of specifications that they want their oil to meet, and we formulate the oil per their request. These specifications however, are not as broad as the Valvoline standards, therefore the Valvoline will cover more applications.
There does seem to be some differences (maybe statistical standard errors of measurement) between respective grades. Maybe they are slightly different?
But if they were the same, I wouldn't expect Ashland to say so. Why would they admit that an oil selling for a fair discount over their labeled Synpower is in fact the exact same oil? Wouldn't make good business sense.
Using it in the '14 Silverado. Dexos rated 0W-20 and no issues.