ACEA is a resistive movement in diversity and freedom, so much that we're following indicator A to the default oil (unless facing severe towing in greek or spanish summer). Imagine just following an easy to read indicator instead of holding your manual two different ways, one for all but then upside down to read Mexico first before hot and greasy hauling!
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Manufacturers really could offer opting-out. Delete-options. Efficiency individualisation packages consisting of a thicker oil, a certificate and manual printing on demand. Or such with additional oil recommendations from blank lines at one's own disposal. Can see a small premium. Plus re-certification of course.