I have two oil-lube Porter Cable electric air compressors. One is a small C3551 Job Boss 4.5 Gallon, 150 PSI, Oil-Lube Mobile Compressor. The other is a CPL6025 6 HP, 25-Gallon, 150 PSI Oil-Lube Compressor.
Both owner's manuals call for API CG/CD Heavy Duty air compressor oils: SAE 30 for the smaller compressor, SAE 20 for the larger one. (Both warn against using multi-viscosity motor oil.)
Neither manual mentions synthetic oil, but a Porter Cable tech rep told me that use of synthetic oil will void my warranty.
I've used Amsoil in the 25 gallon compressor for several months. I exchanged the compressor today when the air pressure regulator valve failed.
I know that failure wasn't related my use of synthetic oil, but the entire time I owned that compressor oil was slowly leaking from the oil drain plug. I tried tightening it, but the oil would still leak slowly. And Porter Cable said not to use any type of thread sealent on the plug.
So now that I have a new one, and have yet to use the smaller compressor, I am really wondering if I should use Amsoil synthetic air compressor oil.
An Amsoil rep I spoke to said I should, but I keep wondering why the synthetic leaked from the larger compressor's drain plug?
Also, why would Porter Cable be so against my using synthetic air compressor oil?
I'd sure appreciate any input.
Both owner's manuals call for API CG/CD Heavy Duty air compressor oils: SAE 30 for the smaller compressor, SAE 20 for the larger one. (Both warn against using multi-viscosity motor oil.)
Neither manual mentions synthetic oil, but a Porter Cable tech rep told me that use of synthetic oil will void my warranty.
I've used Amsoil in the 25 gallon compressor for several months. I exchanged the compressor today when the air pressure regulator valve failed.
I know that failure wasn't related my use of synthetic oil, but the entire time I owned that compressor oil was slowly leaking from the oil drain plug. I tried tightening it, but the oil would still leak slowly. And Porter Cable said not to use any type of thread sealent on the plug.
So now that I have a new one, and have yet to use the smaller compressor, I am really wondering if I should use Amsoil synthetic air compressor oil.
I'd sure appreciate any input.