---
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: "$42.98"
currency: USD
in_stock: true
reviews_count: 13
category: "Stp"
url: https://www.desertcart.us/products/659314820-ultra-5-in-1-diesel-fuel-system-cleaner-400ml-restores
store_origin: US
region: United States of America
---

# 5-in-1 fuel system cleaner Boosts fuel economy STP Wearguard engine protection 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:** $42.98
**Availability:** ✅ In Stock

## Summary

> ⚡ Revive your diesel engine’s soul — power, protection, and savings in one bottle!

## 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?** $42.98 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/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

- • **Fuel Efficiency Maximizer:** Enhances mileage by optimizing fuel combustion and system cleanliness.
- • **Plug-and-Play Maintenance:** Easy to use concentrated formula compatible with all diesel engines.
- • **UK-Made Quality Assurance:** Trusted, premium-grade product with proven reliability and top customer ratings.
- • **All-in-One Diesel Power Boost:** Cleans injectors, removes deposits, and restores peak engine performance.
- • **Advanced STP Wearguard Formula:** Engineered to reduce friction and protect critical engine components.

## Overview

STP Ultra 5 in 1 Diesel Fuel System Cleaner is a concentrated, UK-made formula designed to clean and condition the entire diesel fuel delivery system. It restores engine power, reduces friction, removes carbon deposits, and improves fuel economy, making it an essential maintenance product for diesel vehicles. Highly rated and trusted by professionals, it delivers noticeable performance improvements and helps prevent costly repairs.

## 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: Surprisingly Effective – Brought My Car Back to Life! - I was skeptical at first, but this STP DPF Cleaner really impressed me. I used it on my 2016 BMW 320d which was starting to feel sluggish and occasionally throwing up a DPF warning light. After adding the full 200ml bottle to a full tank and going for a steady motorway drive, I noticed a clear difference after just one treatment. The engine feels smoother, acceleration has noticeably improved, and the DPF warning hasn’t come back since. It genuinely feels like the car is breathing easier now. I also appreciate that it’s made in the UK – gives me confidence in the quality. If your diesel car is showing early signs of DPF clogging or just isn’t performing like it used to, this is a simple and affordable solution before jumping into expensive garage visits. I’ll definitely be using this regularly as part of my maintenance routine. Highly recommend!

## 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 | 16 in Automotive ( See Top 100 in Automotive ) 1 in Fuel Systems |
| Brand | STP |
| Customer Reviews | 4.5 4.5 out of 5 stars (9,736) |
| 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:** 0.88 Pounds
- **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

### ⭐⭐⭐⭐⭐ Surprisingly Effective – Brought My Car Back to Life!
*by S***I on 6 August 2025*

I was skeptical at first, but this STP DPF Cleaner really impressed me. I used it on my 2016 BMW 320d which was starting to feel sluggish and occasionally throwing up a DPF warning light. After adding the full 200ml bottle to a full tank and going for a steady motorway drive, I noticed a clear difference after just one treatment. The engine feels smoother, acceleration has noticeably improved, and the DPF warning hasn’t come back since. It genuinely feels like the car is breathing easier now. I also appreciate that it’s made in the UK – gives me confidence in the quality. If your diesel car is showing early signs of DPF clogging or just isn’t performing like it used to, this is a simple and affordable solution before jumping into expensive garage visits. I’ll definitely be using this regularly as part of my maintenance routine. Highly recommend!

### ⭐⭐⭐⭐ Excellent Product
*by G***S on 29 September 2025*

ExcellentProduct made big bdifferance tomhow my car ran.

## 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

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-09*