November 10, 2022
Does A Car Ac Compressor Need Oil?
Car Air Conditioner

Do you want to know Does A Car Ac Compressor Need Oil or not? If yes, this article is for you.

Nothing is more reviving than the cool blast of air conditioning coming from the vents of a car, truck, or van when the temperatures in the spring and summer start to soar along the highways and congested roadways. That chilly A/C air can feel like the ultimate respite from the virtual oven outside in the heat of 85° or higher temperatures.

Like the heart pumps blood throughout the body, the AC compressor allows a fluid, called refrigerant, to flow through the air conditioning system.

Your air conditioning system must be always oily, just like any mechanical system, and AC compressor oil is the ideal lubricant for the task. But, your car’s air conditioning system requires a sufficient amount of compressor oil to function correctly.

Drivers, therefore, need to be aware of when to change the oil in their car’s A/C compressor as well as the typical symptoms of low oil. For optimum operation and long life, your AC compressor needs lubrication since each time you have metal parts revolving or sliding; they will quickly fail if they aren’t adequately greased.

Let us understand the information and suggestions in this article that will assist you in determining does a car ac compressor need oil.

What Is A Car Ac Compressor?

What Is A Car Ac Compressor

The compressor is the engine that drives the air conditioner, applying intense pressure to the refrigerant before pumping it into the condenser, where it transforms from a gas to a liquid.

A compressor must be in perfect working order for the air conditioner to run at its best—most of the time, an engine accessory belt powers the A/C compressors in autos. The compressor will not run efficiently if the belt is old and slips.

Refrigerant leaks from compressors can also reduce the amount of cold air that enters the interior. There may not be any chilly air if internal components malfunction. Only some HVAC issues can occur with a system that lacks refrigerant. In such situations, you should get a car service from your nearby shop.

Importance Of Oil In Car Compressor

Importance Of Oil In Car Compressor

In addition to preventing wear on the internal bearing surfaces in lubricated screw compressors, oil performs other functions. So, why does a car ac compressor need oil? What are other reasons?

It is preferable to keep your compressor’s maintenance intervals short and perform fewer oil changes, especially during hot weather. The lubricant absorbs the heat from the air compression and transfers it to the compressor lubricant cooler.

In this process, the heat and oxygen in the compressed air degrade the lubricant’s characteristics, perhaps accelerating aging if the heat level is high. Besides causing excessive bearing wear, compressor lubrication that has lost its characteristics coats the insides of the compressors with a varnish that decreases heat exchanger performance and raises the lubricant level to unfavourable levels, further damaging the system.

What Kind Of Oil Goes In An Ac Compressor?

Mineral or synthetic oils are the two types of oils that are frequently used in compressors. Naphthenic mineral oil (MO) is a kind that is frequently used. Glycols and alkylbenzenes (AB) are examples of synthetic oils that have been utilized successfully in refrigeration applications for some time.

The lubricants used by CFC refrigerants such as R12, R13, R113, R114, and R115 are mineral oil or alkylbenzene. The design of HCFC refrigerants like R22, R123, R401A, and R409A also include these lubricants.

Due to their effects on the ozone layer, CFC and HCFC refrigerants have recently seen a decrease in utilization. HVAC equipment has been increasingly using new HFC refrigerants such as R23, R32, R134a, R407A, R407C, and R410A.

The lubricant used by these new refrigerants is polyol esters or POE. POE has the disadvantage of absorbing moisture far more than mineral-based oils do. Appropriate handling practices must be used to minimize the contact of this oil with the environment. Metal containers are used in place of plastic ones to prevent moisture from entering the containers.

How Do I Add Oil To My Car’s Ac Compressor?

Regular maintenance is a great way to keep your air conditioner operating at peak efficiency. Before you start adding new oil, take care to drain any that is already in the system. The compressor should be removed from the vehicle. Four bolts are used to fasten the compressor in the vehicle. Detach the pipes, belts, and cables, then unscrew them to release the compressor. On the back of the compressor, a valve is located. Unscrew it to allow the used oil to drain.

To find out how much oil your particular compressor needs to operate:

  1. Consult your owner’s manual.
  2. Put the new oil into the hole using a funnel.
  3. Replace the bolts and reattach all the tubes, connectors, and wires you previously disconnected.

To check that the oil cycles correctly, cycle the compressor’s belts. Utilize a reclaimer machine to recharge the AC unit.

How Often Should We Change Oil In An AC Compressor?

The answer to this question will differ depending on your air compressor. Naturally, how often you use your air compressor also affects how frequently you must change the oil in some automobiles. Your car’s owner’s manual is the best location to determine how often you should change your oil.

The oil in a reciprocating compressor is changed every three months. If you notice any performance issues, check the oil in your air compressor first; it can affect the pressure and efficiency. Sometimes changing or topping off your oil will take care of the problem. Make sure to replace the filter in your air compressor frequently as well.


You now understand how essential oil is to your AC compressor and how to maintain your car’s air conditioning system correctly. Your compressor’s internal lubricant significantly impacts how long the system lasts. As a result, you should repair your A/C compressor regularly and add the necessary amount of lubricant.

As said before, your air conditioning system has problems because of malfunctioning compressors. Since parts and labour make purchasing a new AC compressor the more economical and dependable course of action, it is typically recommended that your AC compressor has to be serviced.

Whether the compressor is new or used, you should add oil according to your car’s instructions. We hope the information and suggestions in this article will assist you in determining whether a car ac compressor needs oil.

Tags: Car Ac Compressor Oil, Car Ac Compressor Oil Requirement,
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