I observed the same professional race car driver promote one product one year and another product the next year. A lot of race car drivers are going to promote whatever product they can as long as they receive money for promoting the product. I know a few guys who raced cars and they all said that regardless what brand of motor oil or what kind of oil supplement might be advertised on the sheet metal of a racing car that does not mean that the same motor oil or the same oil supplement was actually used in the racing car. Many race car drivers for example have used synthetic oil like Redline for a very long time even if Valvoline or Pennzoil or whatever is painted on the sheet metal of their cars.
And in any case what might be good for a racing car may not be good for a conventional car or truck. Professional race teams change the motor oil after every single race. A motor oil designed especially for racing may be low in detergents for example because the oil is going to be used only for one race. The oil is not going to be used in 6000 miles of city/highway/dirt road driving.
You should be able to go a long, long way using just good quality motor oil (conventional or synthetic), reasonable oil change periods, good oil filters, etc. even using no oil supplements. Before I will use any oil supplement today I want some proof that it really works.
There are today only a few products that I believe in. I have used Auto-RX myself and it certainly seems to work. And a lot of guys at this web site are mechanics, or engineers, or run oil testing facilities, or even are lubrication chemists and a lot of them say that Auto-RX works. I figure they probably know something. I would trust what they say before I would trust what some race car driver says. That race car driver almost certainly is being paid to say what he is saying. And believe it or not some race car drivers are worthless as mechanics. They know how to race cars and that is it. Other people are doing the mechanical work.
I believe in Lubegard products. It used to be that you could see Lubegard products in most automatic transmission shops. I don't know if that is still true today or not. At least in the case of automatic transmission supplements and power steering supplements I believe in Lubegard. I used a Lubegard power steering supplement in a power steering unit that was squealing at startup in cold weather. That supplement permanently stopped the problem. It convinced me. Some of the other Lubegard products I am not sure of. Their engine supplement seems to improve fuel mileage and seems to make an engine run smoother but I think it is too expensive to use with every oil change. Some guys say the Lubegard engine flush is really great but I have never used it.
For fuel supplements I like Gummout Regane and Chevron Techron. If you really have a serious problem with dirty fuel injectors try BG44K. Don't use it too often-only if necessary. You want to know what fuel injector/fuel system cleaner they use at Nissan dealerships and Toyota dealershisp and Honda dealerships? My experience has been BG44K.
There are a few supplements that can be useful in cooling systems. Bar's Leak was used in new cars and trucks.
Beyond this short list I would be really careful about any supplement.