The TSB has been republished by BMW practically every year now, going on a few years. If I can find a copy I'll try to post it. You should read about the history of carbon deposits on intake valves and so forth. BMW was instrumental in investigating the problem years ago (like in the 80's) and actually did independent testing of fuels to determine how much deposits form for a given fuel. I believe it was called the "BMW Test." They took a brand new engine, took it apart, weighed all the major components very accurately. Put it back together. Ran the engine for 50,000 miles or something like that in a lab and then stripped it again and re-weighed all the components. At the time they determined that Chevron gas was the least offensive, though all gas left deposits. Working with Chevron they decided to package their detergent (Techron) in concentrated form for a cleaning "boost" and recommended to do it on regular intervals to maintain performance. Chevrons own testing determined that Techron was safe for all major engine components and has been in all their grades of gas for decades now. (So I'm not sure where is your data on it not being good for fuel system components maybe you should send it to Chevron.)

As far as other manufacturers recommendations, I really could care less what honda, toyota, or anyone else has to say on the matter...that's why I have a BMW and have only purchased BMW's for the past 30 years.