---
product_id: 241583754
title: "40003 Upper Cylinder Fuel Treatment-1L"
brand: "lucas oil"
price: "€ 67.76"
currency: EUR
in_stock: true
reviews_count: 12
category: "Lucas Oil"
url: https://www.desertcart.sk/products/241583754-40003-upper-cylinder-fuel-treatment-1l
store_origin: SK
region: Slovakia
---

# Boosts fuel efficiency up to 5% Reduces harmful exhaust emissions by 20% Cleans & lubricates injectors & carburetors 40003 Upper Cylinder Fuel Treatment-1L

**Brand:** lucas oil
**Price:** € 67.76
**Availability:** ✅ In Stock

## Summary

> ⛽ Unlock peak engine power and cleaner rides—because your car deserves the best!

## Quick Answers

- **What is this?** 40003 Upper Cylinder Fuel Treatment-1L by lucas oil
- **How much does it cost?** € 67.76 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/241583754-40003-upper-cylinder-fuel-treatment-1l)

## Best For

- lucas oil enthusiasts

## Why This Product

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

## Key Features

- • **Emission Neutralizer:** Pass smog tests effortlessly by cutting exhaust pollutants.
- • **Fuel Economy Booster:** Burn fuel more completely to increase miles per gallon and save at the pump.
- • **Dual Fuel Compatibility:** Optimized for both gasoline and diesel engines—carbureted or fuel-injected.
- • **Injector & Pump Longevity:** Extend the life of critical fuel system components with advanced lubrication.
- • **Power Tune-Up in a Bottle:** Revitalize your engine’s performance with every fill-up.

## Overview

Lucas Oil 40003 Upper Cylinder Fuel Treatment is a premium 1L formula designed to clean, lubricate, and optimize fuel systems in both gasoline and diesel engines. It enhances combustion efficiency, reduces exhaust emissions, neutralizes low sulfur fuel effects, and extends the lifespan of pumps and injectors, delivering improved power and fuel economy while helping vehicles pass smog tests.

## Description

Powerful blend of oils and additives that contain no solvents. Designed to increase power and fuel mileage and also lower exhaust emissions through a more complete combustion. Lucas fuel treatment is formulated for both gasoline and diesel engines, carburetted or fuel injected. It gives your fuel system what it really needs - a blend of good slick oils and additives with a high detergent action that allows the engine to operate at maximum efficiency. Also, it cleans and lubricates the carburettor and injectors and causes the fuel to burn more thoroughly for increased power and less fuel consumption. Lucas fuel treatment should definitely be used in vehicles that require leaded fuel because it actually replaces the benefits of lead in gasoline without causing harmful emissions. Use it to pass smog tests. Finally, it totally neutralizes the harmful effects of low sulphur diesel fuel. Lucas fuel treatment complies with the federal low sulphur content requirements for use in diesel motor vehicles and non-road, locomotive and marine diesel equipment engines the recommended dosage is 60-90 ml of fuel treatment for every 38 litres of gasoline or diesel fuel. Pour Lucas fuel treatment directly into fuel tank. Exceeding the recommended dosage is not harmful to your vehicle. One 3.785 litre bottle treats 1513 litres of fuel.

Review: Very good product - Works well for my VW Passat 2L I put 200 ml each full tank 60L The car have more power, for sure the injectors it's cleaned, engine it's running very silent and consumption it's go down a bit I like the product VERY good 👍🏻👍🏻
Review: The best - Best product for your car trust me

## Features

- Good tune-up in a bottle
- Cleans and lubricates the fuel system
- Neutralizes low sulphur fuel problems
- Increases power and miles per gallon by burning excess exhaust emissions
- Increases the life of pumps and injectors

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08LVFBSL9 |
| Best Sellers Rank | 5,199 in Automotive ( See Top 100 in Automotive ) 96 in Fuel Systems |
| Brand | Lucas Oil |
| Customer Reviews | 4.6 4.6 out of 5 stars (252) |
| Date First Available | 25 Oct. 2020 |
| Item Weight | 920 g |
| Item model number | 40003 |
| Manufacturer | Lucas Oil Products Inc |
| Manufacturer part number | 40003 |
| Model | Upper Cylinder Fuel Treatment |
| Product Dimensions | 8.38 x 8.38 x 29.85 cm; 920 g |

## Images

![40003 Upper Cylinder Fuel Treatment-1L - Image 1](https://m.media-amazon.com/images/I/71LTkYpsZvL.jpg)

## Questions & Answers

**Q: Does this help to ckean Catalytic converter in petrol cars**
A: Hello, yes it does. If you have a blocked cat or a larger emissions problem, we suggest our Deep Clean Fuel System Cleaner product as an initial treatment, followed up by using the UCL product for continued preventative maintenance.

**Q: Can it be used with a Dpf additive**
A: Yes it can be used with a DPF additive!!!

**Q: HI do you just pour it in where you put your diesel?**
A: Hi yes just pour in a measured amount straight into your tank

**Q: Can this be used in alfa romeo giulia engines**
A: I'm sure it can yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good product
*by A***N on 24 April 2025*

Works well for my VW Passat 2L I put 200 ml each full tank 60L The car have more power, for sure the injectors it's cleaned, engine it's running very silent and consumption it's go down a bit I like the product VERY good 👍🏻👍🏻

### ⭐⭐⭐⭐⭐ The best
*by T***. on 26 April 2025*

Best product for your car trust me

### ⭐⭐⭐⭐ WORKS WELL
*by C***S on 23 January 2024*

WORKS WELL I THINK ENGINE DEFINITELY RAN SMOOTHER EVEN FOR A WHILE AFTER FINISHED USING

## Frequently Bought Together

- Lucas Oil 40003 Upper Cylinder Fuel Treatment-1L
- Lucas Oil 10001 Heavy Duty Oil Stabiliser, 946 ml

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---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-29*