Did up the John Dere 1028e. Out was conventional PYB 5w30. In went Federated Co-op 0w30 full group 4. Runs like a top.
I have a 2-year old Honda self propelled mower and except for the first fill of Honda oil have used an approximate 0w-30 mash-up of fresh Mobil 1 oil (0w-40, 0w-30, 0w-20). My M1 0w-30 mix is getting down to about a quart now. I have a bunch of Delvac 15w-40 from my diesel car days and was hoping to 50/50 mix the 0w-30 mix with some 15w-40 Delvac. Grass cutting season is here and I need to change the oil before my first cut coming up soon. I can't see that this would be a problem for the Honda but thought I'd pass it by you experts first. The 0w-30 did make for easy cold fall day starts though.
I'll update this with the oil change once I get it done.