Phillips Conoco refines far more oil than does any other oil company so in that respect they are the leader. In my opinion, Phillips probably does the best job of any of the majors at cleaning and purifying oil before its refined. We have a billion dollar oil filtration system put in place called an Aards Unit at our local refinery and it can take the dirtiest nastiest oil and clean it to exacting standards before its refined. I doubt that many other oil refiners are exploring refining processes like Phillips.
Honestly, in the 80s and 90s few oil companies made money in refining and marketing and the big money came from E & P which is exploration and production. It was pretty rare for a company to upgrade and improve their refining capabilities and Phillips was one that didnt abandon the industry. They bought out Tosco and Conoco and became the nations largest refiner. Others such as Exxon find, produce, and sell more crude oil but Phillips is #1 in refining oil into products like gasoline, motor oil, plastics, etc...
So if size matters, capacity and ability matter, then Phillips is #1. Id put Phillips ability to produce and sell a clean basestock up with anybody.
Smaller boutique oils like Amsoil, Royal Purple, and Redline seem to concentrate on high quality products rather than quantity and perhaps they would be good products for your car. Many experts on these boards can give better advice. Certainly state of the art additives do matter.
Honestly, who cares about marketing policies. If you go to AutoZone then they mark up their products so they can make a profit when they sell them to you. If you buy from an Amsoil dealer then he markes up his products so he can sell them to you. If you pay a fee and become an Amsoil dealer then you can buy at wholesale. If you want to buy a lot of Amsoil products then it seems like a good idea to be a dealer and if not then just buy it from an Amsoil dealer and let the guy make a profit just like Autozone does.
Im not saying that Amsoil is the best product or isnt but why complain how its marketed. It seems like everybody allows stores to make some money but nobody wants to allow a little garage dealer carrying Amsoil to do the same.
If you like Amsoil then use it and if you dont then dont use it.
Amsoil wasnt going to market their products at Wal-Mart next to .88 cent Supertech oil so Amsoil had to explore other marketing ideas to get their products distributed. For $30 or $50 or whatever you can be a dealer and buy at wholesale and that seems like a good deal to me if you use lots of their products. And if you dont then whats the harm in letting a garage type dealer make a buck or two.
Just one mans opinion I guess.
Happy Motoring,
Bugshu