by year and model, I used the search firing orders BMW, but of course you can also check other cars
http://autorepair.about.com/sitesear...air&TopNode=99
Mnemonic for six cylinders...
15 is too young
36 is too old
24 is just right..
94 E34 525i M50, Manual, 200,000 Miles
02 E39 530i M54, Auto, 85,000 Miles