Air Con: - whats A/C oil?

tyronekndrck · Jun 20th, 2018, 01:20

I know the ac takes about 35oz or 1000g of Freon. But whats this oil I keep hearing about and how do I add it? is it a gas like Freon or what. and is that included in the 1000g of Freon needed. just replaced engine so the ac system was empty 100%

aland · Jun 20th, 2018, 09:35

'Freon' is a name for old R12 (and similar) refrigerants.
Most cars run R134 now.
The oil is there to lubricate the compressor, and is usually added directly to the compressor when fitting.
If the system has had a major leak the oil may need topping up, but usually it doesn't, just the R134.

Georgeandkira · Jun 20th, 2018, 12:30

Refrigerant oil is called PAG. It lubes and is the material the compressed gas dissolves into.
Today's AC sevice machines are great. They evacuate whatever "gas and oil" is in your system; filtering and separating and storing the two.
When you recharge a system the correct amount of both is reinstalled.
An honest tradesman only bills you for what you need.

My personal experience with these machines includes driving soon-to-be junked / donated vehicles to my friend's garage where he'd evacuate them.
I got "greatly discounted" service from him.

tyronekndrck · Jun 20th, 2018, 15:49

Quote:

Originally Posted by aland

'Freon' is a name for old R12 (and similar) refrigerants.
Most cars run R134 now.
The oil is there to lubricate the compressor, and is usually added directly to the compressor when fitting.
If the system has had a major leak the oil may need topping up, but usually it doesn't, just the R134.

Whoa. So I had already added a 20oz bottle of r134. My car ac gets cold, but should I empty the system out to get oil in there or does it get pushed in like refrigerant.

Georgeandkira · Jun 20th, 2018, 16:47

In all likelihood you're good to go. If the system cools you for the season you're ahead of the game.
If your system leaks down within a month it'd pay to have your system evacuated and refilled to spec using a leak detection dye. Here the tech will have you back so he can look your system over wearing yellow glasses and holding a "black light".

Buy no "leak stop" product for A/C.

I wouldn't recommend repeated use of retail cans as bursting of lines is a regular occurrence.

Absolutely wear eye or even full face protection when doing "cans".

Jun 20th, 2018, 01:20	#1
tyronekndrck Member Last Online: Nov 11th, 2018 17:43 Join Date: Oct 2014 Location: ohio	whats A/C oil? I know the ac takes about 35oz or 1000g of Freon. But whats this oil I keep hearing about and how do I add it? is it a gas like Freon or what. and is that included in the 1000g of Freon needed. just replaced engine so the ac system was empty 100%

Jun 20th, 2018, 09:35	#2
aland Senior Member Last Online: Jan 17th, 2024 15:41 Join Date: Dec 2004 Location: Luton	'Freon' is a name for old R12 (and similar) refrigerants. Most cars run R134 now. The oil is there to lubricate the compressor, and is usually added directly to the compressor when fitting. If the system has had a major leak the oil may need topping up, but usually it doesn't, just the R134. __________________ 2004 V70R 2008 XC90 D5. 2011 C30 2.0 Past: V70 D5, 855 T5, 940, V40 T4, S40

Jun 20th, 2018, 12:30	#3
Georgeandkira Premier Member Last Online: Apr 17th, 2024 16:59 Join Date: Feb 2009 Location: Hackensack	Refrigerant oil is called PAG. It lubes and is the material the compressed gas dissolves into. Today's AC sevice machines are great. They evacuate whatever "gas and oil" is in your system; filtering and separating and storing the two. When you recharge a system the correct amount of both is reinstalled. An honest tradesman only bills you for what you need. My personal experience with these machines includes driving soon-to-be junked / donated vehicles to my friend's garage where he'd evacuate them. I got "greatly discounted" service from him.

Jun 20th, 2018, 16:47	#5
Georgeandkira Premier Member Last Online: Apr 17th, 2024 16:59 Join Date: Feb 2009 Location: Hackensack	In all likelihood you're good to go. If the system cools you for the season you're ahead of the game. If your system leaks down within a month it'd pay to have your system evacuated and refilled to spec using a leak detection dye. Here the tech will have you back so he can look your system over wearing yellow glasses and holding a "black light". Buy no "leak stop" product for A/C. I wouldn't recommend repeated use of retail cans as bursting of lines is a regular occurrence. Absolutely wear eye or even full face protection when doing "cans".

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