Good to know. Dad always drilled the "better safe than sorry" into me. :smile:If you have a high quality synthetic oil, mix it at 50:1 or 42:1. With regular 2 stroke oil mix it at 40:1. There is no need to mix at 25:1 anymore. Oils have improved, and if you mix it at 25:1 you are just wasting oil and clogging the engine up.