# Do I add AC oil

**URL:** <https://community.cartalk.com/t/do-i-add-ac-oil/150501>\
**Category:** Maintenance/Repairs\
**Created:** [October 11, 2019, 3:22pm UTC](https://community.cartalk.com/t/do-i-add-ac-oil/150501 "2019-10-11T15:22:23Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Forfuninde\_158419](https://avatars.discourse-cdn.com/v4/letter/f/9fc29f/32.png) [@Forfuninde\_158419](https://community.cartalk.com/u/Forfuninde_158419)\
**Post date:** [October 11, 2019, 3:22pm UTC](https://community.cartalk.com/t/do-i-add-ac-oil/150501/1 "2019-10-11T15:22:23Z")

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So I’m changing a couple O-rings that are under my quick disconnects going through the firewall on my truck. It must’ve had a slow leak. As of now I’m not going to add oil…

First am I wrong? I’m not changing any major component. I am using the vacuum pump to make sure all the leaks are gone once the O-rings are replaced.

Lastly besides changing the compressor, dryer accumulator, condenser or evaporator is there any other time you should add oil? Is there a guideline on when and when not to add oil?

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [October 11, 2019, 3:34pm UTC](https://community.cartalk.com/t/do-i-add-ac-oil/150501/2 "2019-10-11T15:34:16Z")

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I always add an ounce of oil when just replacing O-rings.

Tester

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**Author:** ![tcmichnorth](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tcmichnorth/32/25126_2.png) [@tcmichnorth](https://community.cartalk.com/u/tcmichnorth)\
**Post date:** [October 11, 2019, 3:37pm UTC](https://community.cartalk.com/t/do-i-add-ac-oil/150501/3 "2019-10-11T15:37:47Z")

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Manufactures specify how much oil to add per component change. Sometimes it’s written on instructions on component.

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<div class="post-metadata">

**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [October 11, 2019, 3:43pm UTC](https://community.cartalk.com/t/do-i-add-ac-oil/150501/4 "2019-10-11T15:43:48Z")

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It usually goes like this,

Compressor=Refer to manufacturer for capacity.

Condenser=2 ounces

Evaporator=1 ounce

Receiver/dryer=1 ounce

Hose assembly=1 ounce

Tester

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<div class="post-metadata">

**Author:** ![Forfuninde\_158419](https://avatars.discourse-cdn.com/v4/letter/f/9fc29f/32.png) [@Forfuninde\_158419](https://community.cartalk.com/u/Forfuninde_158419)\
**Post date:** [October 11, 2019, 5:00pm UTC](https://community.cartalk.com/t/do-i-add-ac-oil/150501/5 "2019-10-11T17:00:06Z")

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So even tho the original line is going back on, you would personally still add an ounce? Is there a place average Joe’s can see info like this incase I’m asked in the future?

Thanks for your help

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<div class="post-metadata">

**Author:** ![Forfuninde\_158419](https://avatars.discourse-cdn.com/v4/letter/f/9fc29f/32.png) [@Forfuninde\_158419](https://community.cartalk.com/u/Forfuninde_158419)\
**Post date:** [October 11, 2019, 5:01pm UTC](https://community.cartalk.com/t/do-i-add-ac-oil/150501/6 "2019-10-11T17:01:15Z")

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No component change. Just 3 O-rings, all on the same fitting.