Hard to tell by color I think, though my
Vette's M1 looks quite golden even after
5K miles of hauling azz...
Whereas my HD's oil looks like fookin thin tar after only
a hundred miles.
We all know the lights are for the mkting/bean counter
gang, to cover that "free" maint. Though I suspect most
major brands of syn oil are really pretty good for 5-7+K
miles.
Give this link a good read; an exc oil tutorial by "withidl",
a very knowledgeable poster on oil, etc.
GL,md
http://www.xoutpost.com/articles/x5/m...ion-101-a.html