Originally Posted By: aquariuscsm
Thank you for contacting Valvoline Product Support with your oil questions.
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.
Originally Posted By: fdcg27
Okay, but what standards does API Synpower meet that NAPA's syn doesn't?
I think they are referring to their own internal company quality standards, not a OEM specification. Notice their lack of weasel words too, they don't say "it may contain", rather they get off the fence and say in writing "does carry a different formulation".
To me it's clearly saying that Valvoline, through their own internal standards, try to make their oil a little better than Napa synthetic. Probably to justify the higher price. But they also say it's not a big difference.
Given how similar Napa and SynPower appear in a PQIA VOA, which only measures the inorganic or metal adds, this suggests three likely differences to me:
- different chemistry inorganic metal adds, but at the same concentration
- different organic or ashless adds used, like VII or PPD or dispersants
- different base oils used. Looking at the Pour Points published for SynPower and Napa, for the same grade oil, SynPower has better (lower) PP which suggests a touch of Group 4 PAO in the SynPower.
If Napa is a quality Grp 3 synthetic, it would be easy for Valvoline to add a touch of PAO to lower the PP, and use a slightly more shear stable VII, to create a similar but improved product which still appeared identical under a PQIA VOA. Not saying this is what Ashland have done, but I am saying a VOA is a simple tool that doesn't measure many oil metrics and that within SN/GF-5/Dexos1 there is ample wiggle room to make a better oil (with the same specs) if your internal company pride demands a better product than just the bare minimum to pass.