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Dodge Repair/AC Problem: PAG viscosity

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Question
Hi,
The AC in my 2001 Ram 2500 with 5.9 Cummins stopped working. I replaced the compressor, oil, accumulator, orifice tube and condenser. I also flushed the evaporator and all other plumbing. Then I  evacuated the system for about 90 minutes and recharged with 32 oz of R134a. When done the AC worked properly. I then realized that I had used PAG 100 oil instead of PAG 20. Will this damage the system of shorten it's working life?
Thanks for your help.
Rusty

Answer
Hi Rusty,
I see in the '01 manual that it does point to use of PAG 20 oil. Unfortunately there is no further discussion about what the effect would be of using a different PAG number oil. This would probably be best answered by a a.c. shop as I don't recall seeing anything in the manuals. The viscosity of the oil is thin if 20, and medium if 100. But whether this is a siginificant issue I would not know.
Roland

Dodge Repair

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Roland Finston

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Free fast answer to your repair question about a Chrysler/Dodge/Plymouth car, minivan, SUV, or truck. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty. This free troubleshoot advice forum helps you diagnose faults, minimize repair costs or do-it-yourself.

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Five decades as a 'do-it-yourselfer' on domestic and imported cars

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Degrees in Physics/bruised knuckles.

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