DISCLAIMER: The information below is purely for entertainment purposes only! The following statements are not presented as the views or opinions of the forum, its members... or me, for that matter.
I am not saying this is GM or any other specific company, but I am sure you have all seen things like this in various product user manuals:
Sometimes, it seems like companies specify a particular product type (sometimes specific product lines within specific brands) if a company or industry "recommends" something as being better over everything else.
Sometimes those recommendations from the partnered corporation or industry group is profit-driven.
Sometimes you'll see something like "X Company recommends use of so-and-so's super-duper whatever for maximum longevity of your thing... Use only blobbity-blah to prevent total destruction or serious injury."
I am not a conspiracy theorist... I just wonder if whatever gets specifically recommended has some reason other than engineering and science behind them.