I j ust heard a program on NPR the other day that went thru and defined all that. Wish i could remember what all they said for ya now. But go here:
http://discover.npr.org/features/feature.jhtml?wfId=1209998

__________________
past MB rides:
'68 220D
'68 220D(another one)
'67 230
'84 SD
Current rides:
'06 Lexus RX330
'93 Ford F-250
'96 Corvette
'99 Polaris 700 RMK sled
2011 Polaris Assault
'86 Yamaha TT350(good 'ol thumper)