I AM melting down (rather than my new compressor) trying to decipher all the oil choices. Coltri, Shell, Bauer....750, 755, 550...Seco Lube 500....Chemlube 751, Maxlube 501, Maxair 101, Ultra Chem 751, Coltri CE 750, Mako Blue, Bauer 1250, SL-800, Anderol 500, Anderol 555. Anderol 750....and on...