Which "smaller" oil company do you trust/like the best?? And why?? I like Warren Oil a fair amount. I think they do a pretty good job making very solid oils at reasonable prices. Even at a Sunoco gas station their full synthetic Lubrigold Dexos approved 5w30 $5.89 is cheaper than Pennzoil conventional at $6.19 a qt. I know that WPP makes very good products as well. Another one is Pinnacle oil company. In Indiana, Illinois, Ohio and other upper Midwest states Pinnacle is rather commonly found. Calumet may well make finished oils as well though I do not know for sure. Omni makes the full synthetic for O Reilly's which seems rather good from test results from PQIA. Shaeffer's out of St. Louis makes a great product as well. My step father worked at Amoco oil refinery in Yorktown. He would have some of their motor oil around at times. I think now he is running Valvoline Maxlife full synthetic in his cars and truck. That is a very good replacement I would say. I think when Giant bought the refinery from Amoco I don't know if they processed anything for use as motor oil. Maybe. I have nothing at all against the big companies who make very good products. SOPUS, Ashland, Chevron and Mobil all do a great job. I think it is cool to support the little guys as well. One thing to remember is that all of the current big guys started out very small at one time too. Even if that was fifty or a hundred years ago. So, which smaller oil blenders do you like??