--- product_id: 241583754 title: "40003 Upper Cylinder Fuel Treatment-1L" brand: "lucas oil" price: "€ 45.37" currency: EUR in_stock: true reviews_count: 12 category: "Lucas Oil" url: https://www.desertcart.gr/products/241583754-40003-upper-cylinder-fuel-treatment-1l store_origin: GR region: Greece --- # Boosts fuel efficiency +7% Reduces harmful emissions Cleans & lubricates injectors 40003 Upper Cylinder Fuel Treatment-1L **Brand:** lucas oil **Price:** € 45.37 **Availability:** ✅ In Stock ## Summary > ⛽ Unlock peak engine power and efficiency—because your ride deserves the best! ## Quick Answers - **What is this?** 40003 Upper Cylinder Fuel Treatment-1L by lucas oil - **How much does it cost?** € 45.37 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/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 - • **Fuel Efficiency Booster:** Increase miles per gallon by optimizing fuel combustion and reducing waste. - • **Universal Compatibility:** Perfect for gasoline and diesel engines, carbureted or fuel injected—one solution for all your vehicles. - • **Eco-Friendly Performance:** Neutralizes low sulfur fuel issues and lowers exhaust emissions to help you pass smog tests effortlessly. - • **Injector & Pump Longevity:** Protect critical fuel system components with advanced lubrication and cleaning agents. - • **Power Tune-Up in a Bottle:** Revitalize your engine’s upper cylinders for smoother, more powerful rides. ## Overview Lucas Oil 40003 Upper Cylinder Fuel Treatment is a premium 1L formula designed to clean, lubricate, and protect your fuel system. Compatible with gasoline and diesel engines, it enhances power, improves fuel mileage by up to 7%, and reduces harmful emissions. This treatment extends the life of pumps and injectors while neutralizing low sulfur fuel effects, making it essential for maintaining peak engine performance and passing emissions 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: Smooth powerful engine treat. - Wonderful product that cleaned my upper cylinders and keeps my car runing very smoothly and powerfully. Delighted and very easy. 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 👍🏻👍🏻 ## 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 | 9,458 in Automotive ( See Top 100 in Automotive ) 123 in Fuel Systems | | Brand | Lucas Oil | | Customer Reviews | 4.7 4.7 out of 5 stars (261) | | 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 ### ⭐⭐⭐⭐⭐ Smooth powerful engine treat. *by L***K on 7 January 2026* Wonderful product that cleaned my upper cylinders and keeps my car runing very smoothly and powerfully. Delighted and very easy. ### ⭐⭐⭐⭐⭐ 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 👍🏻👍🏻 ### ⭐⭐⭐⭐⭐ Overcomes diesel particulate filter (dpf) issues with diesel engines *by A***T on 14 November 2022* Suggested by my car repair garage to save expensive bills cleaning and replacing of the diesel particulate filter for my Nissan diesel engine. Change in driving habits since retiring have led to majority of driving being short distances around town; not ideal for a diesel engine as it never warms up fully. It was recommended to use a small 250 ml tube with a full tank of diesel fuel and then repeat every other tank full. By purchasing the larger bottle, I managed to make significant savings compared to the repair costs, End result has been no issues at all for the last 3 months. ## Frequently Bought Together - Lucas Oil 40003 Upper Cylinder Fuel Treatment-1L - Lucas Oil 10001 Heavy Duty Oil Stabiliser, 946 ml --- ## 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.gr/products/241583754-40003-upper-cylinder-fuel-treatment-1l](https://www.desertcart.gr/products/241583754-40003-upper-cylinder-fuel-treatment-1l) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-07-07*