Thanks for the replies guys! No gas smell in oil.
So, I was getting ready to take it apart and noticed a disconnected tube behind the air breather. I have issues with mason bees getting in things like my air hose fittings and plugging them up, so I took a piece of wire and poked around in...
New guy here. Pretty experienced with car engines - small ones, not so much...
Neighbor bought an older log splitter and said I could use it to check it out. As soon as I started it and it ran for a minute, oil was seeping out from the filler tube. I turned the tube to unlock and it popped up...