Hello,
My daughters 05 Mercury Sable 3.0 DOHC with 73k was running awful and showing multiple codes such as: p0430 / p0174 / p0316 /p0305 / p0306/. A local shop wanted to charge $600 to replace several parts. Knowing I had used STP injector cleaner a week or two before the car started acting up I didn’t think any more cleaner was necessary or would even help. I was about ready to give in and pay for the repairs to help her out when I seen your B12 ChemTool product at a local Meijer and decided to give it a try. After a couple several mile test drives it started to run like new! No more codes either! I’m so thrilled that your product worked so well I bought a few more bottles for preventive maintenance in my other vehicles. We are so relieved and grateful to avoid a costly and unnecessary repair. “Thank you!” really “Thank you!”