WARNING: This page is about a different car, the 2003 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
Remove all bolts.
CAUTION:
Do not use a scraper or special tool to remove the oil pan.
Fig 1: Identifying Bolt Hole To Screw In Bolt To Remove Upper Oil Pan
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Screw a bolt into hole A shown to remove the oil pan.