Larry,
The oil was probably a kind gesture, but if it was an open bottle or if you’re not comfortable using it, don’t. I’ve only used Motul and RevClean and can’t remember either one of those smelling like rear end grease.
Check the rulebook for the association you’ll be racing with on the type of oil required and if there is a required amount. Five ounces of oil per gallon of gas is a good place to start.
LAD Specialties customer / tony kart / rotax / kt100