More oil for 40:1 seems to make sense
Power Care should label this as 2 cycle engine oil only. The label 50:1/40:1 can be a bit misleading. Both answers here are correct to some extent, meaning you can use this oil for both a 50:1 or 40:1 mix but what your not being told is: If you need a 40:1 mix then you better purchase two 2.6oz containers because it takes 3.2oz to make a 40:1mix per gallon of gas. If you are only needing a 50:1 mix then you only need one 2.6oz container to one gallon of gas. Hopefully this explains it better.
Just 1:50. It will work on 1:49 engines for a little while but you risk damage in the long-term
Hi Butch, Please contact customer service for help with this question. 866-340-3912. Thanks for asking. Greg