Good Morning BITOGERS. My brother was asking me about Safety Kleen oils. He knows we use their oil at work. Guess he pulled trigger on few cases of their 5w40 HDEO for his Yukon and some 0w20 synthetic for the Volvo of his. He was wondering if their base oils were as good of quality as others. I told him if it’s ok and serviceable for my works vehicles it must be good and it’s API certified.