Have the system completely flushed out. Use PAG 46 oil and refill with R12. Some people may say not to use PAG oils but experience shows that using the low viscosity PAG oils reduces failures significantly. The system has to have all the original mineral based oils removed as you never want to mix PAG and mineral oils together. A good solvent flush is required to be sure that all the mineral oil has been removed.

The combination of PAG 46 and R12 will give you the best performance and life possible.

You will need a good flush anyway since your compressor no doubt has shed all sorts of debris through out the system. If you don't flush out the system before replacing the compressor and drier the new compressor won't last long.

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I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k