For the price, $.88/qt, it does quite well in UOAs! I've used it with fine results. Certainly there is better, but it will cost more. I finally came to senses with spending $.34/qt more for Phillips 66 Trop Artic ($1.12), which is mostly group III with a good/new additive package. Valvoline All-Climate at $1.69+/qt would be a somewhat equal brand name comparison, which I myself would still use Super Tech over it if price was equal. But again, for the price, I think the Super Tech has shown itself well.