---
product_id: 47954805
title: "Complete Fuel System Cleaner"
brand: "stp"
price: "246 kr"
currency: DKK
in_stock: null
reviews_count: 13
category: "Stp"
url: https://www.desertcart.dk/products/47954805-complete-fuel-system-cleaner
store_origin: DK
region: Denmark
---

# Restores peak engine power Boosts fuel economy Protects engine from wear & corrosion Complete Fuel System Cleaner

**Brand:** stp
**Price:** 246 kr
**Availability:** ❌ Out of Stock

## Summary

> ⛽ Clean fuel, smooth ride, smarter drive!

## Quick Answers

- **What is this?** Complete Fuel System Cleaner by stp
- **How much does it cost?** 246 kr with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/47954805-complete-fuel-system-cleaner)

## Best For

- stp enthusiasts

## Why This Product

- Trusted stp brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy & Safe Application:** Designed for capless tanks with clear instructions, made in the UK
- • **Fuel Efficiency Booster:** Reduces petrol consumption to save money and extend your drives
- • **Engine Protection Shield:** Prevents wear, corrosion, and hesitation for long-lasting reliability
- • **Revive Engine Performance:** Removes deposits from valves & combustion chambers for smoother acceleration
- • **Concentrated Cleaning Power:** One 400ml bottle treats a full tank for deep fuel system cleansing

## Overview

STP GST50400EN is a concentrated 400ml petrol fuel system cleaner that restores engine power, improves fuel economy, and protects against wear and corrosion by removing harmful deposits. Trusted by thousands with a 4.6-star rating, it’s an easy, cost-effective way to maintain peak engine performance between services.

## Description

Concentrated formula cleans and conditions your car's entire fuel delivery system, removing deposits to recover peak engine performance and fuel efficiency.

Review: Good petrol system cleaner - I tried the STP Ultra 5 in 1 Petrol System Cleaner and I am really impressed with the results. I added the 400ml bottle to a full tank as recommended, and after just a few drives I could feel the difference. The engine runs smoother, the idle feels more stable, and acceleration is noticeably more responsive. It also seems to have reduced a bit of hesitation when pulling away. Fuel economy has slightly improved as well – not a massive change, but enough to notice over a couple of tanks. What I like is that it’s a concentrated formula, so one bottle is enough for a full treatment. It gives peace of mind knowing it’s helping to clean injectors, reduce carbon deposits, and protect the fuel system at the same time. Easy to use, good instructions on the bottle, and made in the UK which is a bonus. For the price, I think it’s excellent value – cheaper than a garage clean and helps keep the car maintained between services.
Review: Petrol additive that works - Used this over several years in different cars and always found that after a few miles the engine does appear to run smoother and acceleration is more responsive. Its an additive which does as it says on the bottle and good value for money.

## Features

- Causes severe skin burns and eye damage.
- Harmful to aquatic life with long lasting effects.
- May be fatal if swallowed and enters airways.
- May cause an allergic skin reaction.
- Repeated exposure may cause skin dryness or cracking.
- Concentrated Cleaning Power - Cleans and conditions your car's entire fuel delivery system in one tank
- Restores Power & Performance - Recovers peak engine performance by removing deposits from valves and combustion chambers
- Protects Your Engine - Reduces wear and corrosion, prevents hesitation and power loss
- Reduces Petrol Consumption - promotes better fuel economy
- For capless fuel tanks, please use manufacturer supplied funnel to pour STP additive in

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BPUYPB4 |
| Best Sellers Rank | 170 in Automotive ( See Top 100 in Automotive ) 11 in Fuel Systems |
| Brand | STP |
| Customer Reviews | 4.6 4.6 out of 5 stars (4,438) |
| Date First Available | 6 Feb. 2013 |
| Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. |
| Item Weight | 400 g |
| Item model number | GST50400EN |
| Manufacturer | STP |
| Manufacturer part number | GST50400EN |
| Model | ST50400EN |
| Product Dimensions | 89.79 x 42.49 x 18.11 cm; 400 g |
| Special Features | Concentrated |

## Product Details

- **Brand:** STP
- **Item form:** Liquid
- **Item volume:** 400 Millilitres
- **Item weight:** 400 Grams
- **Material feature:** Non-Toxic
- **Number of items:** 1
- **Scent:** Unscented
- **Special feature:** Concentrated
- **Specific uses for product:** Engine
- **Unit count:** 400.0 millilitre(s)

## Images

![Complete Fuel System Cleaner - Image 1](https://m.media-amazon.com/images/I/616O3WaIc1L.jpg)

## Questions & Answers

**Q: Hi, I know this has been asked already but is this safe to use on a motorbike?**
A: Hi yes. I use it on my old Norton. Works wonders but don't use the whole bottle

**Q: Will this restore old petroleum in my boat fuel tank**
A: Don't know about boat, but my husband said it was great in the car. Hope this helps a bit

**Q: Can I use both the 5 in 1 cleaner and injection cleaner in one full tank?**
A: You could but I wouldn't.  Both products have properties that help clean various parts from the Fuel Tank to the Combustion chamber. In fact the description of both products show 1-2 identical properties. Just use one and then the other after doing a the guide line of 3-4 thousand miles.

**Q: Can this go in a 4 stroke petrol moped?**
A: Yes no problem

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good petrol system cleaner
*by E***S on 17 August 2025*

I tried the STP Ultra 5 in 1 Petrol System Cleaner and I am really impressed with the results. I added the 400ml bottle to a full tank as recommended, and after just a few drives I could feel the difference. The engine runs smoother, the idle feels more stable, and acceleration is noticeably more responsive. It also seems to have reduced a bit of hesitation when pulling away. Fuel economy has slightly improved as well – not a massive change, but enough to notice over a couple of tanks. What I like is that it’s a concentrated formula, so one bottle is enough for a full treatment. It gives peace of mind knowing it’s helping to clean injectors, reduce carbon deposits, and protect the fuel system at the same time. Easy to use, good instructions on the bottle, and made in the UK which is a bonus. For the price, I think it’s excellent value – cheaper than a garage clean and helps keep the car maintained between services.

### ⭐⭐⭐⭐⭐ Petrol additive that works
*by M***K on 25 October 2025*

Used this over several years in different cars and always found that after a few miles the engine does appear to run smoother and acceleration is more responsive. Its an additive which does as it says on the bottle and good value for money.

### ⭐⭐⭐⭐ Noticeable Improvement in Performance
*by A***A on 19 September 2024*

I recently used the STP Petrol Injector Cleaner in my car, and the difference in performance was noticeable almost immediately. This product is perfect for anyone looking to maintain their vehicle’s engine health and improve fuel efficiency. Performance: After using just one bottle in a full tank, I noticed smoother acceleration and improved throttle response. The engine felt more responsive, and the car idled more smoothly than before. It’s great for cleaning out those hard-to-reach parts of the fuel system that can get clogged over time. Fuel Efficiency: Over the next few fill-ups, I saw a slight improvement in my fuel consumption. While the difference wasn’t huge, every little bit counts, especially with rising fuel prices. This cleaner seems to help maintain the engine’s performance, which in turn keeps fuel efficiency up. Ease of Use: Using this cleaner couldn’t be simpler. Just pour the 200 ml bottle into your fuel tank when it’s full, and let it do the work as you drive. The instructions are clear, and there’s no need for any special tools or equipment. It’s a quick, hassle-free way to keep your fuel injectors clean.

## Frequently Bought Together

- STP GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml
- STP Petrol Injector Cleaner 200 ml, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Mechanical Car Cleaning Products, Made in the UK
- Redex Petrol System Cleaner 250ml, Petrol Injector Cleaner To Remove Harmful Deposits, Maximise Performance & Increase Fuel Economy With Redex Fuel Additives For Petrol Engines, Suitable For Hybrids

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-22*