Hi all- I have a quart of leftover 10w40 suzuki motorcycle oil. Was thinking of mixing it with some 5w30 valvoline white bottle and 10w30 oil that came with my firman generator for use with all of my small engines. (toro timemaster mower, toro snowblower, generator) Any possible issues with the motorcycle oil mixing with others? I also have some 15w40 rotella leftover to mix in there as well; usually use that in the mower with good results. What say all?