I really have nothing to base my opinion on, but I’ve always thought of it as another “snake oil”.Car runs good. Just considering, and thought I would throw it out there. I use it in all my machines, but these cars are so touchy . You know how easy they break.
I knew thatThat's because GDI engines build up carbon on the valves due to a lack of gasoline being present to clean them.

MustangMatt what about the refrigerant R12 with the snowman on the can. Enviro 12 stuff that JRichker recommends. Getting ready to order ES12A or R12 enviroThere's other reasons, but that is definitely one of them

I’ve pulled injectors out with 150k plus miles on them that were fine . Send them to Eric Derr . Let him flow , clean, and change the baskets and screens for 75 bucks he charges . You’ll know they are balanced then . He did my Holley 120lb injectors in my car . Was pleasure to deal withNone of you guys rebuild your injectors..I would think that they leak over time
Good luck man!! Lookin good. Now go put some tape over that lower intake!Soaked in paint thinner, and tooth brush. New caps, filters , pintels. The old filters were beat up .Getting ready to paint my valve covers New Ford Blue. Going to be a busy weekend. I have not worked on this car in a while. I think my intake was leaking. The two back bolts were loose. Should I put gasket sealer on the intake to intake. Tomorrow I will rebuild, and clean them