i know it's made by Valvoline, but i have not seen UOA's on it and was wondering what the guru's thought about it? i have used it twice in my wife's '01 tahoe w/ 5.3l v-8, 146k + miles. it is usually priced around $5.00 per quart but i have bought it on sale for $3.12. i change the oil in this tahoe between 5-6k since i have switch to synthetics. it uses a quart or so @ 3k, seems less when running the NAPA.