---
product_id: 51834699
title: "Speed Tec Diesel | 250 ml | Diesel additive | SKU: 3722, k.A."
brand: "liqui moly"
price: "A$35"
currency: AUD
in_stock: true
reviews_count: 8
category: "Liqui Moly"
url: https://www.desertcart.com.au/products/51834699-speed-tec-diesel-250-ml-diesel-additive-sku-3722-k
store_origin: AU
region: Australia
---

# Boosts acceleration by up to 15% Reduces harmful emissions by 20% Compatible with diesel & biodiesel fuels Speed Tec Diesel | 250 ml | Diesel additive | SKU: 3722, k.A.

**Brand:** liqui moly
**Price:** A$35
**Availability:** ✅ In Stock

## Summary

> ⚡ Unlock your diesel’s hidden power and glide through every drive!

## Quick Answers

- **What is this?** Speed Tec Diesel | 250 ml | Diesel additive | SKU: 3722, k.A. by liqui moly
- **How much does it cost?** A$35 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/51834699-speed-tec-diesel-250-ml-diesel-additive-sku-3722-k)

## Best For

- liqui moly enthusiasts

## Why This Product

- Trusted liqui moly brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Engine TLC:** Cleans injection systems and combustion chambers for optimal engine health.
- • **Eco-Smart Formula:** Lowers harmful emissions, helping you drive cleaner and greener.
- • **Power Up Your Drive:** Experience noticeably faster acceleration and smoother partial-load performance.
- • **Trusted Quality & Value:** Premium German engineering that delivers reliable performance at a great price.
- • **Universal Compatibility:** Works seamlessly with both conventional diesel and biodiesel fuels.

## Overview

LIQUI MOLY Speed Tec Diesel is a 250 ml ash-free diesel additive designed to enhance acceleration, smooth engine operation, and clean fuel injection systems. Compatible with both conventional diesel and biodiesel, it reduces harmful emissions while restoring engine performance, making it a must-have for drivers seeking reliable, eco-conscious power boosts.

## Description

This advanced diesel fuel additive enhances acceleration and provides faster, smoother driving in partial load range, compatible with conventional diesel and biodiesel.

Review: Good quality and value - I’ve been very pleased with this product. It arrived on time, well-packaged, and in excellent condition. The quality is solid, and it performs just as described. It’s clear that attention has been given to both design and usability. What I appreciate most is the balance between quality and value — it feels reliable and worth the price. I’ve had no issues so far, and it has met (and even exceeded) my expectations. I’d happily recommend this product to others who are looking for something dependable and effective.
Review: Best for restoring speed and power - Hi I'd tried a multitude of treatments for my Diesel system, after the LIQUI MOLY was in my tank, it took only a few days to feel the speed and power coming back:) I'll be treating as recommended from now on:) BUY !! great price too

## Features

- Causes serious eye damage.
- Harmful to aquatic life with long lasting effects.
- May be fatal if swallowed and enters airways.
- Repeated exposure may cause skin dryness or cracking.
- diesel fuel additive free of ash to significantly improve performance.
- Additive for diesel modern to improve acceleration and for a "softer operation" of the engine.
- It cleans sis injection issues and the combustion chambers. It reduces the emission of harmful tanze sos.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Liqui Moly GmbH |
| Brand | Liqui Moly |
| Model | 4100420037221 |
| Product Dimensions | 63.8 x 21.31 x 20.5 cm; 203 g |
| Item model number | 3722 |
| Manufacturer part number | 3722 |
| Item Weight | 203 g |

## Images

![Speed Tec Diesel | 250 ml | Diesel additive | SKU: 3722, k.A. - Image 1](https://m.media-amazon.com/images/I/81Q9I2dm8HL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can you use with a car which uses Ad Blue**
A: I cannot see a reason why you couldn't.. The ad blue comes into it's own after combustion. This has nothing to do with exhaust.  I would use it without a problem.

**Q: Product 2 states petrol engine, but it's a "kit" for diesels? I've used it twice without realising. Should these be sold as a kit?**
A: Oh dear Pete, red is for diesel and blue is for petrol, by the sounds of it no real harm done. Just remember red is for diesel and don’t fall for bundles without fully reading up on it.

**Q: What is the difference between this and liqui moly 5120 super diesel additive. i have a bmw 320d gt, can i use either one of these?**
A: 5120 is effectively a cleaner Speedtec, is to enhance performance by burning diesel at a slightly higher temperature meaning it s more efficient and therefore provides more power.

**Q: Is this safe to use in Vw Passat 2.0tdi GT DSG wet clutch 2017**
A: Not suitable for wet clutches

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality and value
*by E***A on 19 August 2025*

I’ve been very pleased with this product. It arrived on time, well-packaged, and in excellent condition. The quality is solid, and it performs just as described. It’s clear that attention has been given to both design and usability. What I appreciate most is the balance between quality and value — it feels reliable and worth the price. I’ve had no issues so far, and it has met (and even exceeded) my expectations. I’d happily recommend this product to others who are looking for something dependable and effective.

### ⭐⭐⭐⭐⭐ Best for restoring speed and power
*by O***8 on 2 December 2025*

Hi I'd tried a multitude of treatments for my Diesel system, after the LIQUI MOLY was in my tank, it took only a few days to feel the speed and power coming back:) I'll be treating as recommended from now on:) BUY !! great price too

### ⭐⭐⭐⭐⭐ Mpg, and that's extra kick
*by P***K on 5 October 2024*

I don't know but, maybe not only me feeling his/her car after this liquid feels a lot lighter, even without hard pressed acceleration pedal, runs smoothly and achieving fantastic mpg, am using on full tank 80l of diesel and it's a really a quality product.

## Frequently Bought Together

- Liqui Moly Speed Tec Diesel Additive (250 ml), Mix
- Liqui Moly 1811 Diesel Purge (500 ml)

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**Shop now:** [https://www.desertcart.com.au/products/51834699-speed-tec-diesel-250-ml-diesel-additive-sku-3722-k](https://www.desertcart.com.au/products/51834699-speed-tec-diesel-250-ml-diesel-additive-sku-3722-k)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-27*