Wynn's High-Performance Diesel Fuel System Treatment - Formula Gold Improves Engine Combustion & Acceleration - Reduces Fuel Consumption - Safe for All Diesel Engines - 500ml

Good product. Use it with a full tank of fuel every time since I only drive local.

Dont usually write reviews. Was having problems with the engine management light coming on every time we'd drive anywhere. This was happening over a period of about 6 months and progressively getting more frequent.Tried other products to no avail. Ended up taking the car 3 times to different garages to get the codes read and get advice. Eventually found the problem to be "fuel rail pressure" related. The car did actually cut-out on us whist away on holiday.I Was about to book the car in for full diagnosis and most likely new injectors which could have cost £500+. Thought id try some of this as a last ditch money saving effort on an older car.Put 3/4 of this into just over half tank of fuel. Engine light came on during the first 20 seconds of the first journey (normal at this point). Restarted the car and it hasnt been back on since. This was nearly 4 weeks ago.The cars running noticeably smoother (it was rev hunting before and felt down on power and mpg) this has fixed all those problems pretty much instantly.If you have a fuel system issue id recommend giving this a go. Certainly worked for us. I will be buying again soon as a preventative measure.

Wynns gold additive, so I researched into various products makes etc, on various sites, decided on Wynns taking into consideration feedback, reviews and cost. The results where noticeable in just a week, engine sounded smoother, the engine reaction improved, I could feel difference in both engine and driving, after 3 weeks saw good increase in mph too, I used both petrol and diesel version, petrol change in engine most noticeable, where as diesel engine improved but in sense of less smoke, better mph. Would highly recommend both, as they clearly improved my cars.

I had major problems with chronically poor acceleration in my T180 Toyota Avensis after filling up a few times at the local Texaco station, and another Wynns diesel cleaner hadn't helped much. After reading the reviews, I gave it a go, and the difference was dramatic after it had a while to work through the system. Since then, I have stuck with BP diesel and no further problems; however, I still run this through once every six months or so.It's very easy to use; just pour it in the fuel tank, preferably when less than half full, and drive it normally until you need to fill up again. This is a quality product that can save a fortune at the garage and functions perfectly. My car is 19 years old, but after using this, it drives like a dream for a few months. There is a bit of a smell when putting it in the tank, and I make sure to be careful with the handling, then wash my hands immediately afterwards.

Ok

Noticed a difference in starting and also after adding and covering 100 or so miles had a load of smoke from the exhaust as if it was cleaning my injectors/valves/DPF.Van seems to be running smoother than it was prior to using this additive.

I have an intermittent injector related problem with slight shunting at low speeds & an occasional turbo overboost condition in my Seat Leon 2.0tdi. Not bad enough to spend many hundreds on repairing, but enough to be pretty annoying. Especially as the turbo usually turns itself off whilst going up hills on the motorway, and I go from 70mph to 50mph pretty rapidly!I previously found the Wynns turbo diesel cleaner very effective (but lasting only a tank or two's time) with the latter issue, so I thought I'd try this product for the former one. But I can't say it made much, if any, noticeable difference. Premium diesel from the filling station seemed to do better.Over time I've tried a number of different brands, like Redex, Comma & Forte, but recently I discovered Liquimoly Super Diesel additive & that's worked out better for me. Not sure why, as they're all just cetane boosters, but my injector issue has definitely smoothed out. For now at least!

Well kind of.My hdi was smoking a fair bit under acceleration. Tried redex. And still same.Got this and seems much better.Not as much smoke coming from exhaust.I also cleaned the sensors front he air intake which helped as well.Orignailly bought from halfrauds.But bought 2 off here after seeing initial results. Worth it