---
product_id: 725399688
title: "Diesel Extreme 1 Gallon, Concentrated Fuel System Cleaner, Diesel Fuel Additive, Injector Cleaner - Increases MPG & Restores Engine Performance"
brand: "hot shot's secret"
price: "R4046"
currency: ZAR
in_stock: true
reviews_count: 5
category: "Hot Shot's Secret"
url: https://www.desertcart.co.za/products/725399688-diesel-extreme-1-gallon-concentrated-fuel-system-cleaner-diesel-fuel
store_origin: ZA
region: South Africa
---

# Boosts cetane by up to 7 points Military-grade rust & corrosion inhibitors Cleans & protects fuel injectors & engine parts Diesel Extreme 1 Gallon, Concentrated Fuel System Cleaner, Diesel Fuel Additive, Injector Cleaner - Increases MPG & Restores Engine Performance

**Brand:** hot shot's secret
**Price:** R4046
**Availability:** ✅ In Stock

## Summary

> ⛽ Unlock Diesel Power & Efficiency Like Never Before!

## Quick Answers

- **What is this?** Diesel Extreme 1 Gallon, Concentrated Fuel System Cleaner, Diesel Fuel Additive, Injector Cleaner - Increases MPG & Restores Engine Performance by hot shot's secret
- **How much does it cost?** R4046 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/725399688-diesel-extreme-1-gallon-concentrated-fuel-system-cleaner-diesel-fuel)

## Best For

- hot shot's secret enthusiasts

## Why This Product

- Trusted hot shot's secret brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Engine Armor:** Military-grade rust inhibitors protect vital components from corrosion and moisture.
- • **Deep Clean Power:** Eliminates stubborn injector deposits and varnish for peak engine smoothness.
- • **Maximize Your MPG:** Up to 7-point cetane boost for sharper combustion and better fuel economy.
- • **Simple & Effective:** Just 8 oz. per 20 gallons—easy maintenance for every 6,000 miles.
- • **Science-Backed Performance:** Formulated to extend engine life and restore power with every use.

## Overview

Hot Shot's Secret Diesel Extreme is a concentrated diesel fuel additive designed to clean, lubricate, and protect your entire fuel system. It boosts cetane by up to 7 points, removes internal and external injector deposits, and includes military-grade rust inhibitors to prevent corrosion. Easy to use with 8 oz. per 20 gallons, it improves fuel economy, restores engine performance, and reduces DPF regeneration frequency for a smoother, more efficient drive.

## Description

Hot Shot's Secret Diesel Extreme 1 Gallon, Concentrated Fuel System Cleaner, Diesel Fuel Additive, Fuel Injector Cleaner - Increases Fuel Economy & Restores Engine Performance

Review: Does it do everything it says ?? I don’t know. Shipping was fast , product received in good condition and we use it every few tanks , cheap insurance for the price of trucks nowadays.
Review: This is a great product for my diesel truck

## Features

- CLEANS FUEL STYSTEM: Hot Shot’s Secret Diesel Extreme is designed to thoroughly clean, lubricate, and safeguard all components of your engine & fuel system, such as valves, pumps, rings, pistons, and upper cylinders.
- CLEANS FUEL INJECTORS: Designed to eliminate & prevent the buildup of Internal Diesel Injector Deposits (IDIDs), External Diesel Injector Deposits (EDID's), as well as other stubborn varnish and deposits, this will keep your engine running smoothly.
- BOOSTS CETANE: Increases cetane (up to 7 points), for a more efficient combustion process, improved fuel economy, & increased engine power. It also helps reduce the frequency of DPF regenerations, ensuring a smoother driving experience.
- FIXES ISSUES: Non-alcohol-based water dispersant, fortified with military-grade rust and corrosion inhibitors, stabilizes & prevents rust, effectively dispersing moisture, this product ensures to improve overall engine performance.
- EASY TO USE: With a simple application of 8 oz. for every 20 gallons, this product is easy to use! Just pour it into your fuel tank during your next fill up or every 6,000 miles
- POWERED BY SCIENCE: Our products are engineered to resolve issues, make equipment last longer and improve efficiency. Nothing leaves our building with our name on it unless we know it is absolutely the BEST it can be.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B086DWKK29 |
| Item model number | P040401G |
| Manufacturer | Hot Shot's Secret |
| Product Dimensions | 16.51 x 12.07 x 25.4 cm; 3.51 kg |

## Product Details

- **Brand:** Hot Shot's Secret
- **Item form:** Liquid
- **Material features:** Unscented
- **Scent:** Unscented
- **Specific uses for product:** Diesel Fuel Additive

## Images

![Diesel Extreme 1 Gallon, Concentrated Fuel System Cleaner, Diesel Fuel Additive, Injector Cleaner - Increases MPG & Restores Engine Performance - Image 1](https://m.media-amazon.com/images/I/71hnqNpe-9L.jpg)

## Questions & Answers

**Q: We heard that this product only needs to be used twice a year, does anyone know if it says this on the bottle?**
A: So?? Which came first?!  My bottle says 6,000 miles… this bottle is about 10 months old. 
I’d really like to know if the manufacturer recommends 6k or 6 months! 
Thanks

**Q: Would this product be suitable for a 1.6 Diesel engine in our family car?**
A: I use it it a 1.9 TDI and 2 7.3 diesels.

**Q: Has anyone used this with a TDI with DEF / Urea?**
A: It is specifically designed for restoring the performance of diesel engines so yea it will be fine in your TDI just make sure you follow instructions don't mix it too strong or your car will run like a raped ape for a minute

**Q: I want to use this in a diesel parking heater to try and remove some of the carbon buildup inside the burn chamber. Do you think this would do that?**
A: It is very unlikely that using Diesel Extreme will remove carbon that is already built up in your heater. It is best used as a preventative to combat the amount of soot/carbon build up. Another note is that unfortunately, Diesel Extreme is very odorous and using it in an open heating element may cause some unpleasant odors.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by C***S on 22 October 2025*

Does it do everything it says ?? I don’t know. Shipping was fast , product received in good condition and we use it every few tanks , cheap insurance for the price of trucks nowadays.

### ⭐⭐⭐⭐⭐ Review
*by H***A on 13 June 2025*

This is a great product for my diesel truck

### ⭐⭐⭐⭐⭐ Review
*by J***I on 3 January 2026*

This pairs very well with my 2018 International 4300 Durastar box truck. It has hit the 600,000 mile club and keeps going strong. I have started noticing my fuel tank guage no longer reads correctly and almost took a stab at replacing the fuel assembly unit for a few hundred. I went ahead and got some of this HotShot Secret and poured a 1/4th or 1 Qt for my 70 gallon tank. Beleive it or not, my fuel guage had restored its range after one tank. This pattern remained for about 12,000 miles until it started happening again. Used another 1/4th and got another 15,000 miles. The pattern is slowly going away so this shows that the tank is in fact getting cleaned out which was ongoing with affecting my sensor. MPG has not seen a rise. If anything it has seen a dip from 9.1 down to 8.9. But if it means burning clean with injectors and such, this is not a loss. Effective and great savings for the gallon. Looks good and easy carry size. No stickiness to worry about.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.co.za/products/725399688-diesel-extreme-1-gallon-concentrated-fuel-system-cleaner-diesel-fuel](https://www.desertcart.co.za/products/725399688-diesel-extreme-1-gallon-concentrated-fuel-system-cleaner-diesel-fuel)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-28*