I know it's kinda a stupid question but i was just wondering what kind of oil everyone normally uses. I usually use M1 syn 5W 30. I just read a thread that seemed like most use 10w. Also wondering how long it usually takes before the oil drains back into the pan after running the car to get a good reading off the dipstick. I always seem to have a different oil level all the time. I have a 2002 wrx. Thanks in advance.