I am also surprised the mix stayed in a good state for running. Most of the oil is Klotz oil. It was in the glow fuel to start with and seems to mix real good with methanol. The other oil was Penzoil for air cooled engines I use in my leaf blower and regular 2 cycle power tools. But that was a mistake I just grabbed the wrong fuel container. My next mix will not include the Penzoil. I do not think it is of no benefit and may produce more carbon. Unless a side benefit would be rust prevention?? Just do not know. I do know that fuel was mixed over a month ago and spent a lot of time in the cold. Myself....I am about ready to go to Florida! Thanks for the math lesson....I may need more! Best Regards capt,n