---
product_id: 659314820
title: "Ultra 5 in 1 Diesel Fuel System Cleaner 400ml , Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK"
brand: "stp"
price: "₩55825"
currency: KRW
in_stock: true
reviews_count: 12
category: "Stp"
url: https://www.desertcart.kr/products/659314820-ultra-5-in-1-diesel-fuel-system-cleaner-400ml-restores
store_origin: KR
region: South Korea
---

# Boosts fuel economy by up to 10% Concentrated formula cleans entire fuel system Restores peak engine power & smoothness Ultra 5 in 1 Diesel Fuel System Cleaner 400ml , Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

**Brand:** stp
**Price:** ₩55825
**Availability:** ✅ In Stock

## Summary

> ⚡ Unlock your diesel’s hidden power and save fuel like a pro!

## Quick Answers

- **What is this?** Ultra 5 in 1 Diesel Fuel System Cleaner 400ml , Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK by stp
- **How much does it cost?** ₩55825 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/659314820-ultra-5-in-1-diesel-fuel-system-cleaner-400ml-restores)

## 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

- • **Engine Power Revival:** Bring back your diesel’s original roar and responsiveness
- • **All-in-One System Cleaner:** Targets injectors, carbon deposits & corrosion simultaneously
- • **Fuel Efficiency Maximizer:** Save more on every mile with enhanced combustion
- • **Professional-Grade Formula:** Trusted by tuning experts for reliable, consistent results
- • **Easy Application, Lasting Impact:** Simple to use with effects that extend engine life

## Overview

STP Ultra 5 in 1 Diesel Fuel System Cleaner is a UK-made, concentrated additive designed to clean and protect diesel engines by removing deposits, reducing friction, and improving fuel economy. Highly rated and favored by professionals, it restores engine performance and extends longevity with a single, easy-to-use formula.

## Description

Concentrated formula cleans and conditions the entire fuel delivery system, restoring peak engine performance, reducing friction, and improving fuel economy.

Review: Essential for My Tuning Business – Keeps Diesel Engines Running Smooth - I’ve been using the STP Ultra 5 in 1 Diesel Fuel System Cleaner in my car tuning and workshop business for a while now, and it’s been fantastic. I use it on everything from standard diesel vehicles to high-performance tuning projects, and it consistently delivers excellent results. This cleaner tackles multiple issues at once — it cleans injectors, removes carbon deposits, prevents corrosion, and improves overall fuel efficiency. I’ve noticed smoother running engines, reduced smoke, and more responsive performance after use. It’s also incredibly easy to use and works with every diesel vehicle I’ve tested. Compared to other fuel additives I’ve tried, this one really stands out for its reliability and effectiveness. It’s a small investment that pays off in better engine performance, longevity, and fewer maintenance issues. For any professional working with diesel vehicles — whether in tuning, repairs, or general maintenance — the STP Ultra 5 in 1 Diesel Fuel System Cleaner is an absolute
Review: Good quality - Good quality and appears to do the trick.

## Features

- Contains amides, C18-unsatd., N-[3-(dimethylamine)propyl]. May produce an allergic reaction.
- May be fatal if swallowed and enters airways.
- Repeated exposure may cause skin dryness or cracking.
- Toxic to aquatic life with long lasting effects.
- STP's most advanced formula for diesel engines
- Engineered with STP Wearguard
- Saves fuel
- Restores peak performance
- Cleans up deposits

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00NC1ER3U |
| Best Sellers Rank | 34 in Automotive ( See Top 100 in Automotive ) 1 in Fuel Systems |
| Brand | STP |
| Customer Reviews | 4.5 4.5 out of 5 stars (9,807) |
| Date First Available | 5 Sept. 2014 |
| 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 | 399 g |
| Item model number | 77400EN |
| Manufacturer | STP |
| Manufacturer part number | GST77400EN |
| Model | ST77400EN |
| Product Dimensions | 36.8 x 23.3 x 22.6 cm; 399.16 g |
| Special Features | Concentrated |

## Product Details

- **Brand:** STP
- **Item form:** Liquid
- **Item volume:** 400 Millilitres
- **Item weight:** 399 g
- **Number of items:** 1
- **Scent:** Ketane
- **Special feature:** Concentrated
- **Specific uses for product:** Engine
- **Surface recommendation:** Metal
- **Unit count:** 400.0 millilitre(s)

## Images

![Ultra 5 in 1 Diesel Fuel System Cleaner 400ml , Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK - Image 1](https://m.media-amazon.com/images/I/61LI+B+kwwL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Essential for My Tuning Business – Keeps Diesel Engines Running Smooth
*by T***D on 7 December 2025*

I’ve been using the STP Ultra 5 in 1 Diesel Fuel System Cleaner in my car tuning and workshop business for a while now, and it’s been fantastic. I use it on everything from standard diesel vehicles to high-performance tuning projects, and it consistently delivers excellent results. This cleaner tackles multiple issues at once — it cleans injectors, removes carbon deposits, prevents corrosion, and improves overall fuel efficiency. I’ve noticed smoother running engines, reduced smoke, and more responsive performance after use. It’s also incredibly easy to use and works with every diesel vehicle I’ve tested. Compared to other fuel additives I’ve tried, this one really stands out for its reliability and effectiveness. It’s a small investment that pays off in better engine performance, longevity, and fewer maintenance issues. For any professional working with diesel vehicles — whether in tuning, repairs, or general maintenance — the STP Ultra 5 in 1 Diesel Fuel System Cleaner is an absolute

### ⭐⭐⭐⭐⭐ Good quality
*by F***R on 20 February 2026*

Good quality and appears to do the trick.

### ⭐⭐⭐⭐ Decent Boost, But Don’t Expect Miracles
*by A***. on 17 August 2025*

Used this in my diesel and noticed the engine felt a bit smoother and started easier after a couple of drives. Might’ve given me a slight bump in fuel economy too, but nothing dramatic. Easy to pour in and no issues with the car after. Good for maintenance, just don’t expect instant night-and-day results.

## Frequently Bought Together

- STP Ultra 5 in 1 Diesel Fuel System Cleaner 400ml , Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK
- STP Diesel Particulate Filter Cleaner 200 ml, Cleans and Protects Your Filter by Removing Soot in One Treatment, Restores Power and Acceleration, Mechanical Car Cleaning Products, Made in the UK
- STP Diesel High Milage Injector Cleaner 200 ml, Cleans and Protects your Engine for 300 miles, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.kr/products/659314820-ultra-5-in-1-diesel-fuel-system-cleaner-400ml-restores](https://www.desertcart.kr/products/659314820-ultra-5-in-1-diesel-fuel-system-cleaner-400ml-restores)

---

*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-01*