Rotella T6 15w40 in the gallon container. One type in one container to rule them all (and not a bunch of partials laying around). I wasn't used to the wide-mouth pour spout, so, I basically rust-proofed everything cuz I thought I could aim. It could be used to top off vehicles in an absolute pinch, too.
Honda push mower with gcv160, drained T6 5w40... It seemed thicker than the 15w40 going in for some reason.
John Deere 316 Onan, drained T4 15w40. It wasn't in use the past year+ as I needed to repair the fuel line. When it failed I was just done dealing with things so it wasn't winterized, either. I just used the pusher and got a lot of exercise which was kinda nice... err... necessary.