Last year they moved their production from Colorado to Vicksburg MS. I believe it is a brand that contracts with an independent refiner or blender. Cam2 started out in PA in the late 1960's or early 1970's when I believe Sunoco produced their products. The late Mark Donahue was one of its pitchmen.
I remember using the red can years ago when it was sold at Sunoco stations, IIRC it was developed and owned by Sunoco but sold off in the 80's, it was good oil.