I just learned a tonne of stuff here:
http://www.pvdwiki.com/index.php?title=Suspension_Fluid
At the bottom, they give you a schedule to mix different viscosities of fluid to achieve a target. That's here:
http://www.rohmax.com/rohmax/en/cust...seoilmixtures/
I hope that helps. I just run Amsoil light in everything. Then again, doing what I do isn't necessarily recommended.
blitz