I'm pretty sure (like 97.975%) that Valvoline makes the NAPA synthetic. It's supposed to be the same base stock as Valvoline's SynPower oil but at a cheaper price since it labeled NAPA which makes it a 'group III' synthetic. I'd say at $2/quart, you can't go wrong. Now that i think about it......that's realllllllllllly cheap! You can pay more than that for conventional oil.
Scott