Patent ID: 8201578

Claim:
An oil pan having a structure for adjusting drain amount and seal amount of lubricating oil to be sealed in the oil pan, comprising: a bottom portion; a side wall portion standing upward form an edge portion of the bottom portion; a cylindrical lubricating oil amount adjusting wall structure standing upward from substantially a central portion of the bottom portion and formed, to an inner peripheral portion thereof, with a lubricating oil amount adjusting passage which communicates with an external portion, the lubricating oil amount adjusting wall structure having a lubricating oil drain port formed to a lower portion thereof; a cylindrical lubricating oil adjusting plug assembled detachably to the lubricating oil amount adjusting passage so that the lubricating oil adjusting plug closes the lubricating oil drain port, and the lubricating oil amount adjusting plug being formed with a communication port communicating with the lubricating oil amount adjusting passage; and a drain plug fitted detachably to the communication port of the lubricating oil amount adjusting plug.