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JFairman JFairman is offline
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,223
911 AC systems take about 6oz of oil. Most of it collects in the reciever drier and the compressor will have around 3oz in it after use but there is no sump collecting it in the compressor.

The 3 different types of AC compressor oil I know of can not be mixed or the refrigerent will be contaminated and the whole thing will need to be disassembeld and flushed out with a pulsed flush in both directions.

Ester oil is used when converting an R12 system to R134 and you're reusing most of the parts.
PAG oil is for an R134 sytem that is using all new parts.

You can buy small cans of refrigerent without oil in them and thats what you should use for recharging. If you've been adding the cans with oil the way you say... there is way too much oil in there now, bogging down the compressor and coating the inside of the heat exchangers (condensors and evaporator) with too much oil so they become totally inefficiant and you will never get cold air, of course thats relative and very opinionated in a 911 chassis that was designed way before anyone thought about air conditioning.
Old 08-04-2010, 09:26 AM
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