I was having some smoke and rough idling problems until the engine had "cleared it's throat" so to speak. Also so loud tapping from the front of the engine.
Post purge has completely cleared the smoke and idling problems and the tapping has been iradicated.
I used the product neat and introduced it into the fuel system with temporary flow and return lines from the pump. The flow line had an inline filter on it.
I think I had a leaking injector caused by carbon build up towards the front of the engine, not anymore

I know the best solution would be to remove the injectors and have them serviced but the cost is astronomical compared to £10/$15 for the diesel purge.
I would highly recommend this should be done as part of and annual service. I certainly will.
Sorry if this sounds like a sales pitch, it's not meant to be. Just thought I'd pass on my results from a product that actually does what it says on the tin.
