I changed out two 410a Goodman 4 Ton Gas Packs that vandalls' gutted the coils. I now have two 410a compressors that worked thru one cooling season. The refrigerant system was open for four days before I got the job. I know the oil has been contaminated with moisture. My frugal nature has me wondering about salvageing these compressors. Which would be my best option, changing out the synthetic oil, change to mineral oil, or just junk them out?