Never a dull moment.... In checking over my replacement Delco Drier, I noticed three "Stickers" to choose from, to be placed on top the new Accum/Drier. They all specify Synthetic Oil #12345923. It's for my 96 Eldorado. I ordered parts by my VIN, at the dealer. The dealer came up with #12378526 oil. Well, 923 is ISO 150, and 526 is ISO 46. "When servicing a compressor, technicians must follow manufacturers' recommendations relating to both oil quantity and type. Recently (August 2002),