After Valvoline jumped on board with dexos, I wondered if NAPA would do so with their synthetic oils. According to the GM Dexos website NAPA's 0W-20, 5W-20 & 5W-30 oils are now dexos approved. It's going to be hard to find a better deal on a dexos rated oil if/when NAPA runs their $3.49/quart special. To me this just verifies that NAPA Syn is very similar to Valvoline SynPower.