Yep, and oil companies filed a suit and won when they said this will give better fuel economy as compare to 20w50.
Bro, american enviornment traffic and temperatures are pretty different.
Me and @makhdoom123 used 10w30 toyota mineral and 5w30 liqui moly synthetic respectively, and we both faced many issues. I.e Engine was giving rattling sound at start, high rpm sound and vibrations, noisy and roary engine. We both have shifted to fully synthetic higher viscosities one and found that all the problems have disappeared. Your logic makes sense and it's 100% correct as well, but we have tested it in our cars and it didn't go well coz paki enviornment can't take it
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