My local Napa just started stocking 5 qt. jugs of oil, including house brand 5w20 and '30, which is labeled as "Premium Protection synthetic blend". I was under the impression Napa's oils are all slightly weaker formulations of Valvoline, making the oil in question a close relative to VWB, which last time I looked is still labeled "conventional" - though I've read that VWB 5w20 and '30 is a syn blend, regardless. So is Valvoline just not taking advantage of the opportunity to label theirs a blend while Napa is, or...?