Ashful
Minister of Fire
I'm not willing to risk my machine with this theory... For the record I mix one ratio for all engines even though the machines ask for 40:1 and 50:1. I choose the 40:1.
I think all of my machines are 50:1, except one that's 40:1 and one that's 32:1. The pre-mix bottles I buy are 50:1, and I'm not going to bother doing the math to figure how to mix one 32:1. If the 40:1 or 32:1 machines burn up... good riddance! I can replace them with modern 50:1 machines, and continue not thinking about how much oil I run in them.