Whoa too many questions, and most can searched.
Changing oil is not a pita. Theres an undercover for the engine you need to take out then the oil plug. You're planning to buy one and you haven't checked one out yet? Wtf.
agreed. I dont know how that guy is getting 23mpg mixed. Must be mostly highway because that is high. Best I get in town is 21 which is what the car indicated but when I actually fill up it is closer to 19. Not bad considering the car is rated at 16.I have owned an 03 and and 02 M3's...both had the same gas mileage. In town about 16-18mpg...highway about 24mpg.
You are comparing 2 cars that are COMPLETELY different. If you have to decide between ONLY one...it would depend on comfort and "speed" factor.
It all depends on you and how lucky you are with the car. Here's what I posted almost 2 years ago:What can I expect out of the M3?