Ester Mineral Oil - AC

[280EZRider]

In order to change a leaking hose on my AC, I need to drain, install the new hose, evac, and refill with R12. The oil in the York compressor is Ester mineral, but I have only been able to find synthetic Ester oil. (I can't imagine the 2 can be mixed).

Does anyone know where I can find mineral Ester oil?

If I drain all the mineral Ester from Yorkie, would all seals need replacement for replacing the mineral with synthetic Ester oil?

[Mark DiSilvestro]

Originally Posted by 280EZRider

In order to change a leaking hose on my AC, I need to drain, install the new hose, evac, and refill with R12. The oil in the York compressor is Ester mineral, but I have only been able to find synthetic Ester oil. (I can't imagine the 2 can be mixed).

Does anyone know where I can find mineral Ester oil?

If I drain all the mineral Ester from Yorkie, would all seals need replacement for replacing the mineral with synthetic Ester oil?

If you're staying with R12, you should be using an R12 refrigeant oil, which I believe is a mineral oil.
The ester oil I'm familiar with is one of the lubricants used with R134a systems.
I recently bought a quart of R12 refrigerant oil at CarQuest for the AC in my 240D, which I'm hoping to keep with R12 as long as possible. The bottle says R12 refrigerant oil 500 SS viscosity.

Happy Motoring, Mark

[280EZRider]

It's finally been found! R12 mineral oil at Napa Auto parts.