On top. Open the hood and look to your right, on the driver's side of the engine is a black round cap that needs a filter wrench to remove it. Look at this DIY under "Resources" "DIY Articles", aside from the engine and filter location, yours is 95% identical. You can gravity drain the oil from the drain plug or use a vacuum device to pull through the dipstick.
http://www.peachparts.com/Wikka/OilFilter2