Valvoline VR1 Racing Oil 20W50 contains needed Zinc and is readily available at Walmart. Brad Penn is another good oil available from performance shop or online.
If you don't drive a lot and your car sits with gas in it, look around for non-ethanol gas. It has a long sitting life (ethanol gas go bad in as short as 30 days!) Often available near farm or marinas.
Great advice. I've been running the Valvoline VR1 20W50 for the last couple of years and it works well where I live.