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Jan Andersson
Jan Andersson, ASE Master Tech
Category: Chevy
Satisfied Customers: 834
Experience:  20 years of general automotive repair & modification. Chevy owner.
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Same chevy you just answered 1999 chev suburban. Front and

Customer Question

Same chevy you just answered 1999 chev suburban. Front and rear air. Replacing evaporator and compressor. New compressor comes with 135ml oil. Max compressor fill is 150ml. Do I need to add more to the system or does it contain enough with amount in compressor
+ 15ml added into compressor? does the balance of oil reside in the system?
Submitted: 2 years ago.
Category: Chevy
Expert:  Jan Andersson replied 2 years ago.
Each main component holds about 1oz of oil (30ml), that's Accumulator, evaporator and condenser, and some remains in the hoses esp in a big vehicle with rear AC. Note that the rear evaporator also holds about 1oz. It doesn't come out during normal service, only gas/vapors get evacuated, oil does not come out. So you have maybe 60ml+ still in it (Accumulator and condenser, one evaporator). Some may have leaked out over time, oil gets picked up by refrigerant and that's how it travels through the system.
Expert:  Jan Andersson replied 2 years ago.
It may be hard to get oil into the compressor, as long as it has "close" to the required amount, you're ok and you can put the rest in the other components. Oil doesn't stay in the compressor anyway, it mixes with refrigerant and moves throughout the system constantly. It will all spread evenly as the system is running.