Briggs and Stratton 5500/8500w generator:
Out: Rotella Gas Truck 5w30.
In: Shell Conventional 5w30. Short oil change and went to the cheap conventional since it's getting water/condensation in the oil, just going to run it on this until I get it clean and then go to RT6 5w40.
Craftsman LT3000 riding mower, 20hp Briggs single:
Out: 12 year old factory fill and years of top-ups. (Family's mower I volunteered to change).
In: Valvoline MST 5w40, was clearance at Walmart. Only got about a quart of the old oil out, have to jack up the one side to get it all out. For now just changed the one quart and the filter with another Briggs unit. I'll get it changed to RT6 5w40 later in the summer if it ever stops raining.