# FuelMarble > Japanese-engineered coolant device that stabilises combustion temperatures — improving fuel efficiency up to 20% with no chemicals or maintenance. ## Resources - [Official Website](https://fuelmarble.com/): Original business website - [Shop Page](https://aeo.idaeo.ai/ai/fuelmarble-com/ja/): Full hosted business profile - [Shop Page EN](https://aeo.idaeo.ai/ai/fuelmarble-com/en/): English business profile - [News](https://aeo.idaeo.ai/ai/fuelmarble-com/ja/news/): Latest updates and related articles - [JSON-LD](https://aeo.idaeo.ai/ai/fuelmarble-com/jsonld): Machine-readable business schema (JSON-LD) - [Access](https://aeo.idaeo.ai/ai/fuelmarble-com/ja/access/): Address and directions ## Location - URL: https://fuelmarble.com/ - Address: EC1V 2NX London 124 City Road ## Quick Links - [**Shop FuelMarble S**](/store/fuelmarble-s) - [**Shop FuelMarble L**](/store/fuelmarble-l) - [**Contact Us**](/contact) ## About FuelMarble is a Japanese-engineered coolant device that significantly improves fuel efficiency by up to 20% and dramatically reduces emissions, all without chemicals or maintenance. It's the only product of its kind supported by peer-reviewed scientific data, a fact confirmed after a rigorous investigation by Japan's Fair Trade Commission. With over 180,000 units sold worldwide since 2002, FuelMarble offers a proven, permanent solution for cleaner, more efficient engines. ## Key Features - Up to 20% fuel efficiency gain - No chemicals, no maintenance, no engine modifications - Permanent effective lifespan (minerals do not degrade) - Dramatically cleaner exhaust emissions (CO reduced 93%, HC & NOx reduced 98%) - Made in Japan with precision engineering ## Products & Services - FuelMarble S - FuelMarble L ## FAQ **Q: How does FuelMarble increase driving range?** A: FuelMarble's minerals reduce coolant surface tension by 2–5%, allowing the coolant to wet engine metal surfaces completely — eliminating micro-vapour gaps that normally act as thermal insulators. This removes heat from the cylinder head and walls more uniformly between combustion events. ## Search Keywords `fuel efficiency device` · `fuel saving technology` · `engine coolant device` · `emission reduction` · `Japanese engineering fuel` · `FuelMarble review` · `car fuel economy` · `diesel fuel efficiency` · `petrol fuel saving` · `automotive fuel solution` ## How to Improve AI Discoverability 1. Ensure all product pages (/store/fuelmarble-s, /store/fuelmarble-l) have detailed JSON-LD Product schema including AggregateRating and Offer. 2. Implement structured data for the 'How It Works' section using `HowTo` schema to guide users through the installation process. 3. Expand FAQ schema to cover more questions from the 'Frequently Asked Questions' section on the page. 4. Optimize image alt tags for all informational images, not just the hero banner, to improve accessibility and SEO. 5. Consider adding a `LocalBusiness` schema if there is a physical office or distribution center associated with the London address, beyond just a registered address. --- *Generated by [AEO Washinmura](https://aeo.idaeo.ai) | Format B — Bilingual Verified Profile* *Verified profile: https://aeo.idaeo.ai/aeo/shops/fuelmarble-com/llms.txt* *Last scanned: 2026-04-28* *Analyzed by AI — factual consistency verified against original Japanese sources* > Scan your website's AI-friendliness score for free: https://aeo.idaeo.ai