Timing was at 31 degrees with hall sensor in middle of range. Since I don't think my hearing/eyesite and shaky hands would let me get better and 2 degrees of accuracy to my measurement I decided to just leave the sensor in the middle as I confirmed it was close to 30 deg. If I get time I'll tack full throttle at min and max sensor range to see what is best. The Ace 2-Cycle Engine Oil states Low Ash formulation blended for maximum engine protection. That is what the side of the bottle says. Made in USA. Already got a bowman ring on it. Installed before ever running engine.