As you all know, I was excited to purchase my first 240 last night, a great-looking '84 242 with an M46. This is going to be a great car to tool around in.

I just have a few quick questions about the nuts and bolts of the car: 1) What kind of oil should I use? Should I do regular or synthetic? (car has 203k)
2) How often must the timing belt be changed, considering that the B23 is not an interference engine like my beloved 850? 3) Should I change the tranny fluid in the M46 on a yearly, or twice-a-year basis? 4) Finally, about the rear end- how often should I change the differential fluid?

I know it's a really old car by anyone's standards but I have every intention of babying and meticulously maintaining my 242 just like I do with my '96 850 (which is now in storage again, by the way).