Hi Roy
I would agree they are a good company and have a good product.Last year a customer with Volvo S40(Mitsubishi GDI engine)had problems. These engine seem to carbon up if used on short runs.
Main dealer solution was strip down to remove deposits and replace EGR and IASC, a expensive job as you would imagine.
I asked him to run several days with Forte flush in the sump. He then reported back that it was starting to run better.The oil was then drained and a can of gas treatment added to fuel tank.
My first customer this year was same guy, who now had a smooth running Volvo and could I supply him a Forte flush pending a service.