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Recommended PAG Viscosity? Conversion Service Fittings?

paulo57509 on Sun March 21, 2010 3:25 AM User is offline

Year: 1992
Make: Chevrolet
Model: Lumina Euro
Engine Size: 3.1L
Refrigerant Type: R12
Country of Origin: United States

I'm still gathering up the necessary materials for my conversion to R134a.

I need some PAG oil, but I don't know which viscosity I should use. I "think" I should use a 150 viscosity, but I'd like some verification.

Also, I'd like to know what size fittings I will need for the service ports. The .pdf file for Chevy models (vehicle listings) appears corrupt (


Chick on Sun March 21, 2010 11:19 PM User is offlineView users profile

When doing a retrofit, I would suggest using BVA auto 100 ester oil over PAG..Just a personal choice.. But if you go with PAG use 150. But the system MUST be totally clean before using PAG, you can't have any mineral oil in the system, so a flush is needed, As far as the fittings, when you order them from, tell them the make year and model and you'll get the right ones.. The low side fittings are all the same, the high side I believe are the 3/8th fittings I believe for that year

Email: Chick


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