Bests & Worsts Reviews from Amazon

Purchased several 5W30 5 quart bottles since it was advertised as full synthetic only to learn that MSDS clearly states up to 75% is "highly refined oil" further research of the base oils listed in the MSDS published by company that the base oil also contains Group 1 & Group 2 oils. I also froze oil in my freezer overnight and it gelled up far more than Quaker State full synthetic and Pennzoil indicating the oil is not a good oil for my winter application. Contacted company directly and they stated it is "acceptable marketing practice" .