Synthetic oil for a shop air compressor pump? It's getting close to the time to change the oil in my 5hp, 80-gallon, 3-cylinder single stage, electric air compressor. Being a "diehard" fan of Mobil 1 ...
Mobil 1 is not recommended for air compressor applications. If you want to use synthetic oil, you should find synthetic compressor oil that is specifically designed for this application.