For a full system evacuate and recharge (R134a, '94 Jag XJ6), how much oil should go into the system with the refrigerant?

According to my Haynes techbook, you need 4 to 5 oz.

Base your oil recharge on how much oil came out during evacuation. You can put to much oil in the system. AC work goes to the shop IMHO

An evacuation only removes air and moisture. It doesn’t remove oil. In order to remove oil from an AC system, the system would have to be disassembled and the components flushed with a special solvent. So if you didn’t do this, there’s still the old oil in system components. And adding any more will…

out=in. or drain the compressor,and see what is left,subtract that from the manual,and there you have it.plus the evap,condenser,receiver dryer. just assume there is 3/4 left and add the difference. best bet take it to an A/C shop.too many variables for me to explain.

Have you ever used a recovery machine? Maybe I didnt make my self clear. When you recover the refridgerant charge oil comes out with it the charge and the oil are mixed together.The oil and the refridgerant are seperated inside the recovery machine,after every recovery you drain away the oil and mea…

Yes. I’ve got my own refrigerant recovery machine. And I know exactly how they work. And you are right. When refrigerant is reclaimed some oil is removed with the refrigerant. Now I want you to look at the original post. Do you see anywhere where it was mentioned that a reclaiming of refrigerant wa…

If you want to evacuate systen must be empty. I did conclude that proper recovery was preformed.It didnt occour to me that someone who new about evacuation would also vent to the atmosphere. I gave the guy to much credit. I made a mistake in making a conclusion.So the guys got a pump no recovery mac…

If you buy refrigerant that already has oil in it, you won’t need to worry about it.

A/C question: how much oil to add on a recharge?

Maintenance/Repairs

mcparadise June 29, 2008, 5:35pm 4

I agree. I do not classify automotive AC work as do-it-yourself.

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A/C question: how much oil to add on a recharge?

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