WOL Diesel Injection Cleaner - Liqui Moly 2520 Diesel Engine Purge 1 L - Diesel Purge Fuel System Cleaner - Removes Deposits Clean fuel System (1)

Initially I had a problem with it as it came damaged. Spoke to the seller and he resolved the issue.I filled my tank with it when I had 0 miles in. So far I don't see a difference between before and after. I checked my injectors readings through ISTA+ so I might update the post later.Maybe the engine is slightly quieter now.

This works very well.

Really pleased with the results. It does exactly what it says on the tin.

Noticed over the years the engine getting noiser with a knock at low revs and a rattle noise (like a slinky spring going down the stairs). Decided to do a direct purge by-passing the fuel filter and fuel tank on the injector system using this and some pipes and small fuel filter. Took about an hour to get through the full litre of liquid including the odd rev up.The knock is almost totaly gone when warming up and gone when engine warm, the rattle noise at high revs has gone totaly. I have also noticed the engine is quiter overall and the pick up from stand still is improved.For the price its worth a go if you are experincing issues like mine.

yet to be used but recommended by a VW Technician

I used it direct through injectors. I knew I had one injector with bad flow, by the end of the process I had two bad injectors.The filter I used , in fact two inline filters I used caught absolutely nothing.Maybe my 280k mile system wasn't dirty and my 140k mile injectors were most likely on the way out.I won't bother to use this product in a PD engine again.