Best oil for My Slant 6

Here is the Gospel Truth on Pennsylvania Crude Oil. It has been referred to as being the best oil in the United States. Crude Oils are either paraffinic base or asphaltic base, or a combination. Paraffinic based oil produces the best lubricants for most purposes. Pennsylvania Grade Crude Oil has superior qualities and is free of asphaltic constituents, contains only trace amounts of sulfur and nitrogen, and has excellent characteristics for refining into lubricants. Pennsylvania Grade Crude Oil is thermally stable, has a high viscosity index, is resistance to oxidation and is high in paraffin and other waxes making it highly desirable for refinement into petroleum lubricants such as motor oil. Pennsylvania grade crude oil when seen in reflective sunlight has a green color and under ultraviolet light looks fluorescent. Products refined form this oil are particularly prized as lubricants and many oil companies prominently display the fact that they use Pennsylvania Grade Crude Oil in their products.
Wolf's Head
Pennzoil
Quaker State
(Kendall)