My brother and I switched the oil from dino to Mobil 1 Synthnetic (Extended Performance 15w50). Man, between the ignition wires, plug, distributor and rotor we replaced on Sunday and this new oil, the car is running so sweet! I can't wait to get up in the morning and drive the BMW!
We also changed out the 2 remaining belts I had gotten the wrong part on and got to try out my new Draper service reset tool. These cars just seem to love it when they're maintained!