hey brztech, sounds like your on to something with the VSOP conversion, but to answer your question about the oil being saturated with refrigerant besides low oil temp. There is a piping circuit on the YK's and YT's called the oil sump vent line, same theory that is used on the YT's but no vent line solenoid. The pipe comes off the compressor at the lowest or close to the lowest pressure which is near the eye of the impeller and goes to the side of your oil sump-near the internal oil eductor block. Basically used to vent the refrigerant vapor out of the oil sump, pressure goes high to low always. If this doesn't happen your oil laden refrigerant will foam violently and cause your oil pump to cavitate and lose prime or pressure, how ever you may. Hope that makes sense and maybe helps in the future.