Josh, there are several points to consider before buying an oil for your engine. First, when Model As were made, there was no ZDDP or any other additive available so our engines were designed to run on non-detergent, straight mineral oil. We don't have camshaft/lifter problems because our engines don't make the power or devlop enough stress in the valve system to require it. Second, by using a non-detergent oil, you are giving up the following: Oxidation and bearing corrosion inhibitors (to keep the oil from thickening and your bearings in good shape for a very long time), rust and "iron" corrosion inhibitors (to prevent rust from forming on "shiny" parts), detergents/dispersants (to keep products of combustion and other junk in suspension and off the internal parts of your engine), foam inhibitors (foam won't lubricate anything), extreme pressure additives (like ZDDP, but different chemistry), and others. Oil "detergents" are not the Lux Liquid type (why would anyone design an oil with an additive that would wash off oil? They don't). These are chemicals that prevent sludge and varnish buildup on internal parts - something I would think you'd want to do with a new engine. Stay away from non-detergent oils in any engine and take advantage of 80 years of oil technology.
