I was at Napa today to pick up 5 quarts of their house brand 5w20 syn for my brother's Taurus. They only had one quart so the guy said hey we have mobil 1 5w20 for $7.50 per quart, and I said no offense but I can get that at Walmart for $23 for 5 quarts. He said since you are buying a bunch of stuff (buying a boat battery and some spark plugs) he would sell the mobil 1 for $24 for the 5 quarts. Pretty cool and is the reason I like to shop at Napa even though they tend to be the most expensive place around.