STP Complete Diesel Fuel System Cleaner – 400ml (65400EN)

Name: STP Complete Diesel Fuel System Cleaner - 400ml (65400EN)
Brand: Stp
SKU: STP-65400EN
Price: 8.29 GBP
Availability: InStock

£8.29 inc. VAT

24 in stock

Next-day delivery Order by 1pm Monday and it’s with you on Tuesday.

Not sure it’s right for your car? WhatsApp us your reg

400ml diesel system cleaner
STP's strongest detergent formula
For hard starts and lost power

Next-day UK delivery £3.99 (order by 1pm Mon–Fri), or free click & collect from our Bulwell shop — 2–4 Carey Road, NG6 8AT. Choose collection at checkout, then pick it up any time in opening hours (Mon–Fri 9–5:30, Sat 9–1) — just quote your order number.

Next-day UK delivery £3.99 (order by 1pm Mon–Fri). Home delivery only: click & collect isn’t available for this item. With items from our shop in the same order, delivery is £5.99 (two parcels).

SKU: STP-65400EN Category: Additives & Cleaners Brand: Stp

Description
Additional information

Description

Genuine STP · Part no. 65400EN

Safety: Danger. May be fatal if swallowed and enters airways. Toxic to aquatic life with long lasting effects. Repeated exposure may cause skin dryness or cracking. Read the label before use.

STP's Complete Diesel Fuel System Cleaner is a 400ml one-shot treatment for diesel engines that start badly, hesitate or have lost power. STP says this formula carries the most detergent of any in its range, so it is the one to pick for a thorough clean-up of a neglected diesel rather than routine top-ups.

Good to know

When is a complete cleaner worth it? On a high-mileage diesel, a car bought with no service history, or one that has sat unused, where deposits have had time to build up through the system.
How do I use it? Add the bottle as the label directs, usually into the tank just before filling with diesel, then drive the tankful through normally rather than in short hops.
What can't it do? It won't repair a worn injector, a failing pump or a faulty sensor; if hard starting comes back soon after, the car needs a proper diagnosis.

Which one?

For a cleaner aimed only at the injectors, the STP Diesel Injector Cleaner – 200ml (59200EN) is the smaller dose; the petrol version of this treatment is the STP Complete Petrol Fuel System Cleaner – 400ml (50400EN). Neither is on our site yet.