--- product_id: 303488871 title: "Nitrox Catalytic Converter Petrol Cleaner, 500 ml" brand: "nitrox" price: "€ 33.65" currency: EUR in_stock: true reviews_count: 13 category: "Nitrox" url: https://www.desertcart.gr/products/303488871-nitrox-catalytic-converter-petrol-cleaner-500-ml store_origin: GR region: Greece --- # Instant engine performance boost 500 ml precision dosing Cuts harmful emissions fast Nitrox Catalytic Converter Petrol Cleaner, 500 ml **Brand:** nitrox **Price:** € 33.65 **Availability:** ✅ In Stock ## Summary > 🚗 Clean fuel, clear conscience, and a ride that’s ready to impress! ## Quick Answers - **What is this?** Nitrox Catalytic Converter Petrol Cleaner, 500 ml by nitrox - **How much does it cost?** € 33.65 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/303488871-nitrox-catalytic-converter-petrol-cleaner-500-ml) ## Best For - nitrox enthusiasts ## Why This Product - Trusted nitrox brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Engine Longevity:** Prolongs engine life by preventing buildup and reducing wear - • **Revive Your Ride:** Instantly cleans carbon & resin deposits for smoother engine function - • **Fuel Economy Upgrade:** Boosts MPG by restoring fuel system efficiency - • **Pass with Confidence:** Optimizes catalytic converter efficiency to help you sail through MOT emissions tests - • **Effortless Application:** Simply pour into your fuel tank—no mess, no hassle ## Overview Nitrox Catalytic Converter Petrol Cleaner (500 ml) is a powerful liquid formula designed to clean carbon and resin deposits from your engine, fuel, and exhaust system. It improves fuel efficiency, reduces harmful emissions, and helps vehicles pass MOT emissions tests with ease. Easy to use by pouring directly into the fuel tank, this cleaner restores engine performance and prolongs engine life, making it an essential maintenance product for petrol vehicles. ## Description Nitrox Catalytic Converter Petrol Cleaner, 500 ml : desertcart.co.uk: Automotive Review: Excellent product if emissions too high during MOT!!! - My 11 year old Skoda (petrol) failed its MOT based on emissions, which were way too high. The garage already replaced the Lambda sensor etc and although this brought down the emissions, they were still too high to pass the MOT. Nothing else was visibly wrong, there was no engine/ catalytic warning light, no exhaust or engine noises or visible fumes, no burning smells etc. Garage said to take it to a main dealer for a more in-depth diagnostic as they couldn’t put their finger on why emissions were still so high. However, before I went down that route, I decided to get a second opinion from another local garage who suggested to try a catalytic cleaner, give it a good run out on the motorway (50 miles each way) and fill up again with 98 octane petrol (rather than the 95 octane/ E10 stuff as that apparently causes more carbon deposits and blockages in the catalytic converter and exhaust system than the previous 95 octane petrol, which can lead to higher emissions). Second garage said that if there was something wrong with the catalytic converter and the car needed a new one (£1,000 upwards), then it would definitely show up via a warning light and/ or during the diagnostics stage, so that was probably not the problem. Anyway, bought the Nitrox Catalytic Converter Cleaner Petrol via desertcart based on the good reviews from people with similar problems to mine and did as suggested by the second mechanic/ instructions as per bottle – AND IT WORKED! Car passed its MOT the second time round, with no emissions issues at all! My tank was ¾ full when I put the cleaner in, then went for a 100 mile round trip down the motorway, used up a bit more petrol commuting to work for a couple more days, booked another MOT three days after the motorway trip and it passed no problem. Extremely happy with the product and the advice provided by previous reviewers and will keep this in mind for next year’s MOT. Will also start to fill up with 98 octane petrol from now simply to prolong the life of the engine/ car – 11 years is not that old after all. As previous reviewers have said, give it a try before you fork out for expensive repairs on your exhaust system and/ or catalytic converter, especially if there are no engine or exhaust noises or fumes and the car is otherwise running well. Review: Impressed - Works well seems to improve fuel ## Features - Causes serious eye irritation. - Causes skin irritation. - Highly flammable liquid and vapour. - May be fatal if swallowed and enters airways. - May cause damage to organs through prolonged or repeated exposure. - May cause drowsiness or dizziness. - May cause respiratory irritation. - Repeated exposure may cause skin dryness or cracking. - RESTORE YOUR ENGINE: Breathe new life into your engine! This multi-purpose formula gets to work instantly, cleaning away harmful carbon and resin deposits from the entire engine, fuel and exhaust system, boosting MPG, and reducing harmful emissions from your car. - SAIL THROUGH EMISSIONS TESTS: Use just before your MOT to help you pass emissions tests - INSTANT EFFECT: Clean Cat's advanced formula cleans your system straight away - EASY USE: Pour straight into your fuel tank and let Clean Cat get to work ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B091Z28593 | | Best Sellers Rank | 2,168 in Automotive ( See Top 100 in Automotive ) 92 in Fuel Systems | | Brand Name | Nitrox | | Contains Liquid Contents? | Yes | | Customer Reviews | 4.3 4.3 out of 5 stars (566) | | Included Components | Nitrox NPC500 Catalytic Converter Clean Cat Petrol Fuel and Exhaust System Cleaner 500ml | | Item Form | Liquid | | Item Type Name | System Cleaner | | Item Volume | 17 Fluid Ounces | | Item Weight | 0.5 Kilograms | | Manufacturer | Tetrosyl Limited | | Material Features | Unscented | | Number of Items | 1 | | Scent | Unscented | | Specific Uses For Product | Automotive Exterior | | Surface Recommendation | Autmotive Exterior | | Unit Count | 500.0 millilitre(s) | ## Product Details - **Brand:** Nitrox - **Item form:** Liquid - **Item volume:** 17 Fluid Ounces - **Item weight:** 0.5 Kilograms - **Material feature:** Unscented - **Number of items:** 1 - **Scent:** Unscented - **Specific uses for product:** Automotive Exterior - **Surface recommendation:** Autmotive Exterior - **Unit count:** 500.0 millilitre(s) ## Images ![Nitrox Catalytic Converter Petrol Cleaner, 500 ml - Image 1](https://m.media-amazon.com/images/I/61ZsUWX+FmL.jpg) ## Available Options This product comes in different **Configuration, Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent product if emissions too high during MOT!!! *by A***. on 21 February 2024* My 11 year old Skoda (petrol) failed its MOT based on emissions, which were way too high. The garage already replaced the Lambda sensor etc and although this brought down the emissions, they were still too high to pass the MOT. Nothing else was visibly wrong, there was no engine/ catalytic warning light, no exhaust or engine noises or visible fumes, no burning smells etc. Garage said to take it to a main dealer for a more in-depth diagnostic as they couldn’t put their finger on why emissions were still so high. However, before I went down that route, I decided to get a second opinion from another local garage who suggested to try a catalytic cleaner, give it a good run out on the motorway (50 miles each way) and fill up again with 98 octane petrol (rather than the 95 octane/ E10 stuff as that apparently causes more carbon deposits and blockages in the catalytic converter and exhaust system than the previous 95 octane petrol, which can lead to higher emissions). Second garage said that if there was something wrong with the catalytic converter and the car needed a new one (£1,000 upwards), then it would definitely show up via a warning light and/ or during the diagnostics stage, so that was probably not the problem. Anyway, bought the Nitrox Catalytic Converter Cleaner Petrol via Amazon based on the good reviews from people with similar problems to mine and did as suggested by the second mechanic/ instructions as per bottle – AND IT WORKED! Car passed its MOT the second time round, with no emissions issues at all! My tank was ¾ full when I put the cleaner in, then went for a 100 mile round trip down the motorway, used up a bit more petrol commuting to work for a couple more days, booked another MOT three days after the motorway trip and it passed no problem. Extremely happy with the product and the advice provided by previous reviewers and will keep this in mind for next year’s MOT. Will also start to fill up with 98 octane petrol from now simply to prolong the life of the engine/ car – 11 years is not that old after all. As previous reviewers have said, give it a try before you fork out for expensive repairs on your exhaust system and/ or catalytic converter, especially if there are no engine or exhaust noises or fumes and the car is otherwise running well. ### ⭐⭐⭐⭐⭐ Impressed *by J***E on 5 November 2025* Works well seems to improve fuel ### ⭐⭐⭐⭐ Excellent service,great value. *by C***Y on 3 January 2026* Speedy service ## Frequently Bought Together - Nitrox Catalytic Converter Petrol Cleaner, 17 Fl Oz - Liqui Moly 2007 Jectron Gasoline Fuel Injection Cleaner - 300 ml , blue , 10.14 Fl Oz (Pack of 1 ) - Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber. --- ## 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/303488871-nitrox-catalytic-converter-petrol-cleaner-500-ml](https://www.desertcart.gr/products/303488871-nitrox-catalytic-converter-petrol-cleaner-500-ml) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-05-07*