The 2010 oil system is far better then the 2009 in my opinion. they figured out the baffeling inside the tank and have a small catch tank uphill from the res. incase anything gets past the baffels. the way the turbo bolts to the tank instead of just being suspended by it is a far better design. Its made of aluminum.
Ive put a season on one and never had to add oil once, and my sled finds itself upside down a lot.
hope this helps
adam