Ok, silly question, can you mix engine oils?

I've got two different 'brands' of semi-synth 10w40, both bike specific but not enough of one to do an oil change. Being tight, i'd rather use them both up.

If they are both 10w40 and both semi-synth no problem.

To be honest a lot of oils come from the same refinery they just have different cans and stickers

as long as the vescosity is the same then no problem.