Thanks for the help everyone.

I have decided to change the oil, might aswell learn a thing or two while I'm at it!

About the gasoline. Now I have heard some people telling me to top off the gas and some say I should drain it as much as I can. It won't get freezing cold but not exactly warm either (not over 10�C), isn't it better to fill it up completely to avoid condensation? And if I do, can I just drain that and refill with fresh gas come spring?