---
product_id: 47954805
title: "STP GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml"
brand: "stp"
price: "5011 kr"
currency: ISK
in_stock: null
reviews_count: 8
category: "Stp"
url: https://www.desertcart.is/products/47954805-stp-gst50400en-st50400en-complete-petrol-fuel-system-cleanner-400-ml
store_origin: IS
region: Iceland
---

# Restores peak engine performance Reduces fuel consumption Concentrated 400ml formula STP GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml

**Brand:** stp
**Price:** 5011 kr
**Availability:** ❌ Out of Stock

## Summary

> ⛽ Power up your drive with every drop!

## Quick Answers

- **What is this?** STP GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml by stp
- **How much does it cost?** 5011 kr with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/47954805-stp-gst50400en-st50400en-complete-petrol-fuel-system-cleanner-400-ml)

## 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

- • **Trusted UK Quality:** Made in the UK with a non-toxic, unscented formula—professional-grade care you can rely on.
- • **Fuel Economy Booster:** Optimizes fuel combustion to reduce petrol consumption and save you money on every drive.
- • **Engine Protection Shield:** Reduces wear and corrosion, preventing hesitation and power loss for long-term engine health.
- • **Engine Performance Revival:** Removes stubborn deposits from valves and combustion chambers to restore smooth acceleration and stable idling.
- • **Concentrated Cleaning Power:** One 400ml bottle cleans your entire fuel system for a full tank—maximum impact, minimal effort.

## Overview

STP GST50400EN is a concentrated 400ml petrol fuel system cleaner designed to remove deposits, restore engine performance, and improve fuel economy. Trusted by thousands with a 4.6-star rating, it protects your engine from wear and corrosion while delivering smoother acceleration and reduced hesitation. Made in the UK, this non-toxic formula offers professional-grade maintenance in one easy treatment.

## 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 | 123 in Automotive ( See Top 100 in Automotive ) 9 in Fuel Systems |
| Brand | STP |
| Brand Name | STP |
| Contains Liquid Contents? | Yes |
| Country of Origin | United Kingdom |
| Customer Reviews | 4.6 out of 5 stars 4,444 Reviews |
| Global Trade Identification Number | 05020144800866 |
| Item Form | Liquid |
| Item Volume | 400 Millilitres |
| Item Weight | 400 Grams |
| Item form | Liquid |
| Item height | 7.13 inches |
| Item volume | 400 Millilitres |
| Manufacturer | STP |
| Material Features | Non-Toxic |
| Material feature | Non-Toxic |
| Number of Items | 1 |
| Scent | Unscented |
| Special Features | Concentrated |
| Specific Uses For Product | Engine |
| Specific uses for product | Engine |
| Unit Count | 400.0 millilitre |

## 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

![STP GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml - Image 1](https://m.media-amazon.com/images/I/616O3WaIc1L.jpg)
![STP GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml - Image 2](https://m.media-amazon.com/images/I/71JuOOi3oTL.jpg)
![STP GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml - Image 3](https://m.media-amazon.com/images/I/71VzBwFJJsL.jpg)
![STP GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml - Image 4](https://m.media-amazon.com/images/I/71lSgYn2vSL.jpg)
![STP GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml - Image 5](https://m.media-amazon.com/images/I/81uSXvpWwnL.jpg)

## Available Options

This product comes in different **Style** options.

## 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 Iceland*
*Store origin: IS*
*Last updated: 2026-01-23*