Never understood blend, which I think marketed squarely as the lesser informed. If I want blend, I’ll blend it myself with dino and synthetic from same maker usijg same weight in a ratio I want.I used nothing but Super Tech dino in my previous Corolla that went 295K, and my current Corolla that has 438K and is still going, but I started using their full syn after dinos went away, and they became blends. I think the price of blends are too high, which makes full syn a better value. I can't see paying the prices they want for a blend...either way, I don't think there is such a thing as a bad oil...
Availability of Kirkland full synthetic has been a blessing. It is more than good enough and cost less than dino sold at other retails.