Lawnmower with Honda GCV160
Out: Drip oil, Honda Power Equipment 10W-30 & M1 10W-30 mix (~25hrs, 1yr)
I had 1/2 jug of M1 10W-30 left over from a car I no longer own and a few half-quarts of Honda 10W-30 in the garage so I poured it together in the jug and shook it up.
After oil changes in my family's vehicles, I let the empty bottles drain into a drip bottle. This is a mix of 0W-20, 5W-20, 5W-30, 10W-30 & 10W-40. I pour the drippings into the mower first, then top it up with the 10W-30 mix. Runs great. Clean & clear oil when I change it every the fall.
Honda EU2000i Generator
Out: Honda & Mobil 1 10W-30 mix (~20hrs, 2yr)