The sticker in the engine compartment says 2.50 lbs for refrigerant and says the oil type is ND-8 but doesn't give capacity. O'Reilly says the capacity of oil needed for my Durango with front and rear AC is 7.5 oz. My new compressor came with 3.5 oz. Do I drain that and add a total of 7.5 oz to the compressor? I see on the web where some say not to add all the oil to the compressor but to add 1/2 to the compressor and half into the drier. Is the drier supposed to get oil? That just doesn't sound right to me.

 

The oil circulates thru the entire system, so, where you add it really doesn't matter overmuch. Adding it ALL to the compressor though, could find you with a compressor that won't turn....... (hydrolock) That could be bad.

 

Thanks for the help. I finished this job shortly after the previous post. Just getting back with results. All went well. I flushed with some cleaner and blew it out with the air hose. I may have used too much pressure because I developed a leak in the evaporator. I drilled a hole in the bottom corner of the plastic housing it lays in and could see freon drip out. I'm not sure if this problem existed before doing this job or not.
Local quotes for changing the evaporator were from $900-$1500. I read about Red Devil Stop Leak and used it with great success. It's different than the stop leaks that fix by adding debris to the line. This has an oil that when exposed to air, such as at the point of the leak, the oil gels and seals the leak. It was around $40.00 for the can at local parts store and it sealed it up after about 4 days.