RE: ZDZ 40RVL/Penzoil Air cooled oil?
I have a 40RV-L that has just finished its first gallon and a half of gas. I've run Pennzoil 2-Stroke oil in it at a 40:1 ratio and it's doing fine. In fact, I'm getting noticably more power from it now and once the second gallon of gas has been run through I'll swap out the 20 X 8 Bambula prop for a 20 X 10 Bambula and lean it out just a tad. As it is, it just "gurgles" a tad at wide open throttle...............slightly rich. As for the gas/oil ratio, I may just keep it at 40:1 for safety's sake. I'll let the spark plug be my guide.
All in all, this is a fine engine that only gets better the more it runs. I'm lovin' mine!