The full 4d56 maintenance schedule is in the Tech Specs forum. Try this link: http://tsikot.yehey.com/forums/showthread.php?t=31294

However, some Mitsubishi owner's manuals do not contain this schedule (I don't know why they left it out). So I scanned it from the Hyundai Starex manual (which uses the same engine).

Congrats!

P.S. you can also find the 4d56 engine full service manual (the one used by the casa), in our tech specs forum. It's in .pdf format. Just download it.