has alot of good info. very very technical.
basicly if you run on a bumpy track use a softer shock oil. if it is smooth run a harder oil.
although you have to remember that if the oil is too thick it will create understeer and if it is too thin it will turn in to quick maybe even bringing the rear loose.
usually springs make a bigger difference. put in a oil like 55wt or 45wt (v1r oil stock is 40wt i think) and tune the springs from here. unless the track is a permanent set up don't bother with the oil too much.