STP Diesel Injector Cleaner 200 ml, Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

The STP Diesel Injector Cleaner (200 ml) is a concentrated maintenance treatment specifically formulated to restore the performance and efficiency of diesel engines by tackling the carbon deposits that naturally build up over time. In a diesel system, even small amounts of residue on the injector nozzles can disrupt the precise, atomized spray pattern required for clean combustion, leading to sluggish acceleration, rough idling, and increased exhaust smoke. This cleaner works by dissolving those stubborn gums and varnishes in just one tankful, often providing a noticeable improvement in engine responsiveness and fuel economy within the first 50 miles of driving. The application process is incredibly simple and designed for DIY maintenance without the need for tools or mechanical disassembly. For the best results, you should pour the entire 200 ml bottle into a nearly empty fuel tank just before filling up with diesel; this ensures the additive mixes thoroughly with the fresh fuel as it enters the tank. A single bottle is typically rated to treat between 50 and 60 liters of fuel and is fully compatible with all standard diesel engines, including modern common rail systems (DI and IDI), as well as bio-diesel blends. It is also safe for use in vehicles equipped with Diesel Particulate Filters (DPF) and catalytic converters, as it burns cleanly without leaving harmful residues behind. Regular use of this injector cleaner—ideally every 3,000 miles—can serve as a powerful preventative measure against long-term engine wear and expensive repair bills. By keeping the fuel delivery system clean, you not only maintain the vehicle’s original power and "pick-up" but also help it pass emissions tests by ensuring a more complete and efficient burn of the fuel. While it is particularly effective for older or high-mileage vehicles that may have years of accumulated buildup, even newer engines benefit from the added lubricity and corrosion inhibitors. Overall, it is an affordable, "pour-and-go" solution that helps keep your diesel engine running smoother, quieter, and more economically.

Good quality and price

Renowned brand, can only hope it works! Won’t know unless I take injectors out.

I put in my campervan ,good stuff fully recomended to use i defnetly buy again

Ive been having problems with white smoke coming from my vauxhall zafira diesel on start up and on short journeys , could even smell smoke In the cab at times , also had a glow plug warning light , took it to the local garage who said I had a problem with one or more diesel injectors ,said it could be a strip down job , lots of time and money , were reluctant to even work on on it !! bought this STP Diesel injector cleaner added it to the tank and the results were almost instantaneous, no smoke on start up , no smoke while driving and the warning light has gone out ! car is also running much better , its Day 5 now and everything still ok , well worth a try ! it worked for me !

Made a big difference to my morning startup, highly recommended

I have used this and similar products on and off over the years and they have definitely worked, unfortunately i have noticed no difference with this product. That does not mean it isnt working, it could just mean my fuel system is clean.

stp ,, wynns ,, liquid molly always good ... best price wins

بيخلف فى أداء العربية

Fait très bien son boulot

غير جيدة غير مناسبة

Parece que fue bien, el tiempo dirá. Tenia problemas de injector, y ahora parece que funciona mejor, difícil de valorar.

Prodotto ottimo mi a risolto il problema sulla valvola E G R con spia motore accesa dopo uso spia motore spenta tutto ok.