BC,
No hand has provided some very intresting information.. To add, I'd never use a fork fluid in a shock.. And I would not use the Motorex in the shock either FYI, regardless of what they say on the package..
I'd suggest that shock fluids are not a place to skimp. I've tried a lot of diferent fluids, and brands, along with custom stuff, and I've never regreated using top-qulaity, when you compare the small diference in price with performance and longevity.
BR,
Jer