2006 gz250 - wrong oil!

[Stilkikn]

While it's a good idea and common practice, warming up the engine before changing the oil isn't mandatory. It will take longer to drain if cold but will do no harm to your engine.

Have you downloaded the manual yet? If not I strongly advise that you do that before anything else. Here's the link. https://app.box.com/s/aaokv6nqyhq0hsw71req