Jamie, careful here as I have had this when I tried matching Kev's setups with AE oils.
AE oils have a CST number on them now as well as a wt number BUT comparing like for like I think that you should go for the "round the value up" rather than "round the value down" approach as the AE oils seem a bit lighter below 30wt and a bit heavier above when compared CST vlaues with the CORE CST values.
As an approximation I would suggest CORE 500CST ~ 40wt AE and CORE 300CST ~27.5wt AE ... should give you a starting point
|