The crank-case uses the saem oil as that found in the container. This is why in the manual it tells you to warm the bike up a bit before checking. Having the bike running re-circulates the oil around properly. If you were to check the oil without first starting it up, it will read as if you are low on oil because when the machine sits, oil slowly seeps from the tank down into the crankcase. Grab your manual for their step by step instructions, but the only place you need to check is the dipstick in the oil tank.