I'm just learning that some FO's are either heavy or light.
When you recieve your bottles from your supplier, open them up
to see if they are light or heavy.
When a FO bottle is not full to the top, it is a heavy oil.
When a FO bottle is full to the top, it is a lighter oil.
When looking at FO's, the ones which are darker color are usually
the heavier oils.
When they arrive, weigh each one and see the difference.
Lynn