Well marked can. Oil goes in as soon as it's empty, so it's mixed fuel the instant fuel is added. I've even added oil when I was using it to get fuel for a four stroke engine because that was the only fuel can I had with me. Stuff happens, and I'd rather run a few ounces of two stroke oil through a four stroke than accidentally run straight gas in a two stroke.
I only fuel my engines with my fuel that I mixed, I don't trust anyone else's mix. They might be running a more careful mix than me, but they also might be running a glug or two of a partial quart of marine two cycle oil from 1973 that they got at a garage sale for a nickel. Or no oil at all. At least if I burn down my saw it's on me.
I only fuel my engines with my fuel that I mixed, I don't trust anyone else's mix. They might be running a more careful mix than me, but they also might be running a glug or two of a partial quart of marine two cycle oil from 1973 that they got at a garage sale for a nickel. Or no oil at all. At least if I burn down my saw it's on me.