As much as my system was messed up (two clogs, dissimilar oils in the old compressor), I don't think measuring the old compressor's oil is meaningful. If the new capacity is 170cc, I think it makes sense to drain the new one, then add 170cc back to it, and add the specified amounts to the drier, condensor and evaporator. Right?

I think the line "if the system has not been flushed with r11" is the key thing in the FSM. My system should have zero oil in it after all the flushing.

Man, the FSM is confusing sometimes