Maybe I am out of the loop on this. When did M1 0W-40 FS get LL-01 approval again, was it associated with a formulation change?
https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/products/mobil-1-fs-0w-40
https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/products/mobil-1-fs-0w-40