---
product_id: 47954805
title: "GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml"
brand: "stp"
price: "₨774"
currency: SCR
in_stock: true
reviews_count: 13
category: "Stp"
url: https://www.desertcart.sc/products/47954805-gst50400en-st50400en-complete-petrol-fuel-system-cleanner-400-ml
store_origin: SC
region: Seychelles
---

# Concentrated 400ml formula Improves fuel efficiency & engine performance Cleans entire fuel delivery system GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml

**Brand:** stp
**Price:** ₨774
**Availability:** ✅ In Stock

## Summary

> ⛽ Drive cleaner, drive smarter — fuel your engine’s full potential!

## Quick Answers

- **What is this?** GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml by stp
- **How much does it cost?** ₨774 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/47954805-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

- • **Fuel Efficiency Boost:** Noticeable improvement in mileage over just a few tanks
- • **Trusted UK-Made Quality:** Highly rated with 4.6 stars and thousands of satisfied users
- • **All-in-One Concentrated Formula:** One bottle treats a full tank, saving time and money
- • **Peak Engine Performance Restored:** Removes stubborn deposits for smoother, more responsive driving
- • **Protects & Conditions Fuel System:** Reduces carbon buildup and safeguards injectors for long-term reliability

## Overview

STP Complete Fuel System Cleaner is a concentrated 400ml treatment designed to clean and condition your vehicle’s entire fuel delivery system. It effectively removes deposits, improves engine smoothness, enhances acceleration response, and boosts fuel economy. Trusted by thousands with a 4.6-star rating, this UK-made formula offers an affordable, easy-to-use alternative to costly garage services, keeping your car running at peak performance between maintenance visits.

## 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: Excellent product - Worked an absolute treat on my 30 year old Moto Guzzi. Cleared all the crap out and now the old girl runs sweet as a nut!

## 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.
- car parts

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BPUYPB4 |
| Best Sellers Rank | 173 in Automotive ( See Top 100 in Automotive ) 11 in Fuel Systems |
| Brand | STP |
| Customer Reviews | 4.6 4.6 out of 5 stars (4,460) |
| 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 | ST50400EN |
| Manufacturer | STP |
| Manufacturer part number | ST50400EN |
| Model | ST50400EN |
| Product Dimensions | 35.35 x 16.73 x 7.13 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

![GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml - Image 1](https://m.media-amazon.com/images/I/616O3WaIc1L.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.

### ⭐⭐⭐⭐⭐ Excellent product
*by H***K on 28 January 2026*

Worked an absolute treat on my 30 year old Moto Guzzi. Cleared all the crap out and now the old girl runs sweet as a nut!

### ⭐⭐⭐⭐ 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 Seychelles*
*Store origin: SC*
*Last updated: 2026-02-10*