We do that BG thing here for transmissions and it is just a pain in the rear. They made it unnecessarily complicated with 4 different part numbers of trans fluid. But someone, not in parts, is getting a kickback somewhere. I just have to babysit it and deal with it. So far we have had 2 vehicles brought in on a hook after servicing because the service writer picked the wrong labor op. Everyone is on notice that if I have to double check their BG snake oil part numbers, I am handing out genuine Motorcraft or Mazda ATF.
My favorite VW dealership pushes the BG oil additive. The VW manual says an oil additive can void your warranty. . Somebody is making a buck somewhere and it ain’t VW.