Napa is Valvoline and I use it quite a bit. They typically have decent sales on the napa brand oil. It looks like they have a conventional High Mileage too. Box even says developed by Valvoline.I'm a former loyal Valvoline user too and really liked it but I switched to Pennzoil without regret after Valvoline stopped making the conventional High Mileage. Any of the major brands of oils are fine, I'd use Walmart/NAPA/etc. brand conventional High Mileage engine oils without a second thought if I couldn't find Pennzoil.