2007-03-16 20:43:21 · 4 answers · asked by rina t 1 in Cars & Transportation ➔ Maintenance & Repairs
Because it lubricates the internal moving parts and keeps the gaskets from drying out.
2007-03-16 20:47:21 · answer #1 · answered by Anonymous · 1⤊ 0⤋
For the same reason you add oil to your car. It keeps the seals moist and it lubricates the compressor. However, you should never have to add oil once the system is charged. If you have a leak, it is against the law for repairmen to refill it unless the leak has been repaired. It's for the environment.
2007-03-17 04:20:03 · answer #2 · answered by Fordman 7 · 0⤊ 0⤋
Gotta keep seals lubed and compresser.......1-3 ozs usually enough..but check your Chiltons book
2007-03-17 03:51:48 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Never unless its escaped.
2007-03-17 03:47:53 · answer #4 · answered by frank m 5 · 0⤊ 0⤋