I'm working on a 2000 SE with the 2.5 V6. For some reason I can't get the oil drain plug out. Using a socket is impossible due to the location of the exhaust system. I've tried using a wrench and it wont move. I'm trying to turn it counter-clockwise. The dealer has changed the oil on this care before. But I have no idea what they have done to it so I cant get the 15mm plug out. Any tricks to getting it out?