Refrigerant oil

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May 8, 2010 | 03:41 PM

benpa

Thread Starter

Junior Member

Joined: May 2009

Posts: 9

Refrigerant oil

My A/C is not that cold, I need to add some R-134a to the A/C system, but I do not want to evacuate the system. Should I add plain R134a or mix of R-134a and oil?

May 8, 2010 | 11:36 PM

Midniteoyl

4th Gear

Joined: Mar 2009

Posts: 3,042

From: Indiana

normally, the 134a you get from the auto store will have a little bit of oil in it. Other than that, unless you evac it, you dont need to add oil.

May 9, 2010 | 07:54 AM

benpa

Thread Starter

Junior Member

Joined: May 2009

Posts: 9

I only see two types of R-134a cans, one contains about 20% oil, the other is pure R-134a. 20% is proportion of oil in refrigerant as stated in the service manual. Should I go with the can with 20% oil?

May 9, 2010 | 11:45 AM

Midniteoyl

4th Gear

Joined: Mar 2009

Posts: 3,042

From: Indiana

As just replacement with no evacuation, yes.

Jul 21, 2013 | 10:15 AM

newtonhubcap

1st Gear

Joined: Jul 2013

Posts: 8

I just a got 98 Quattro A4 2.8, love the car. Everything is great and working properly but for my own knowledge did the 98 require R134a or were they still using R12 in those years.

Thanks in advance