i use the same thing..
dump some oil out till side of bottle says 650ml on a flat surface.
or do the math with it all in the bottle.
there will be 296ml left in bottle lol i think if i did math right?
automatic Transmssion fluid will do the job as well, although the Yamalube has something that helps prevent shearing of the oil between the gear cogs, which means less foam and better protection.