don't know the part number but i know UAS stock them... they're pretty cheap from memory
changing oil
ok if you get under your car and look at your radiator you will see there is a black plastic pipe (2 of them) that connect to the radiator. the bottom lines of the radiator are your cooler...
Mitsubishi's instructions are:
1. take the car for a short drive (5-10 minutes).
2. turn the car off
3. unplug on of these cables
4. turn the car back on. it will pump out the oil ( do not run the car for more than 60 seconds). as soon as you see smoke coming out of the pipe turn it off... don't worry about the smoke as its just hot oil...
5. allow the car to cool... say 30 minutes (and let it continue to drip oil during this time).
6. connect the pipe back up and fill your oil up. from memory its 4.5L...
i use the best quality redline stuff its like 30.00 / L and well if you're going to do a lot of hard driving its worth it. If your just doing the occasional fang then normal ATF is fine.
it's really easy to do and shouldn't take you much more than an hour including warming up your car.
so make sure that the metal pipe is actually pointed at whatever you plan to fill up. I used a bit of garden piping to squirt it where i wanted.