Return & Refund Policy

Overview

FuelMarble offers a 30-day performance guarantee. If you have followed the installation instructions correctly, driven a minimum of 200 km after installation, and do not experience any improvement in fuel efficiency, you may request a full refund within 30 days of your purchase date.

We also accept returns on items that arrive damaged or defective.

1. 30-Day Performance Guarantee

If FuelMarble does not deliver a noticeable improvement in fuel efficiency after correct installation and a minimum of 200 km of driving, contact us within 30 days of your purchase date for a full refund of the purchase price.

To qualify:

• •FuelMarble must have been installed in the coolant reservoir (not the fuel tank, oil reservoir, or any other location)
• •A minimum of 200 km must have been driven after installation
• •The request must be made within 30 days of the purchase date
• •The unit must be returned to us (return shipping at customer cost)

This guarantee applies to the performance of the product only. It does not extend to vehicle repairs, manufacturer warranty decisions, or any third-party costs.

2. Damaged or Defective Items

If your FuelMarble arrives damaged or broken, contact us within 30 days of receipt with your order number and photos of the damage. We will arrange a replacement or full refund at no cost to you, including return shipping.

3. How to Request a Return or Refund

Contact us by either of the following:

Please include:

• •Your order number
• •Your reason for return
• •Photos if the item arrived damaged

We will respond within 2 business days.

4. Refund Processing

Approved refunds are processed within 14 days of receiving the returned item. Refunds are issued to the original payment method.

5. Return Shipping

For performance guarantee returns, the customer is responsible for return shipping costs. We recommend a tracked, insured service. FuelMarble cannot be responsible for items lost in transit.

For damaged or defective items, we will provide a prepaid return label or reimburse reasonable return shipping costs.

6. Vehicle Warranty — Important Notice

FuelMarble is a solid glass device placed in the coolant reservoir. It does not dissolve, does not release chemicals, and does not modify any engine component. Independent testing at Kurume Institute of Technology confirmed no adverse effects on coolant chemistry or engine components.

Under UK, EU, and US consumer protection law, a vehicle manufacturer generally cannot void your warranty solely because an aftermarket device is present — they must demonstrate that the device directly caused the specific failure being claimed.

However, FuelMarble Ltd cannot guarantee the response of any specific vehicle manufacturer or dealer. Warranty terms vary by manufacturer, country, and vehicle age. You are responsible for verifying that installation is consistent with your vehicle's warranty terms before installing.

FuelMarble Ltd's liability for any warranty-related claim is limited to the purchase price of the FuelMarble unit. We accept no liability for manufacturer warranty decisions, repair costs previously covered by a manufacturer warranty, or any consequential loss arising from a third party's warranty decision.

7. Limitation of Liability

To the maximum extent permitted by applicable law, FuelMarble Ltd's total liability for any claim arising from the purchase or use of FuelMarble shall not exceed the purchase price paid for the unit.

FuelMarble Ltd is not liable for:

• •Indirect or consequential loss
• •Loss of vehicle manufacturer warranty coverage
• •Engine or vehicle repair costs
• •Loss of use of a vehicle
• •Any costs arising from a third party's warranty decision

Nothing in this policy limits liability for death or personal injury caused by our negligence, or any liability that cannot be excluded by law.

8. Installation Responsibility

FuelMarble must be installed in the coolant reservoir only. Installation in any other location (fuel tank, oil reservoir, brake fluid reservoir, washer fluid tank) is incorrect and voids this policy. FuelMarble Ltd accepts no liability for damage resulting from incorrect installation.

9. Pre-Existing Vehicle Conditions

FuelMarble Ltd accepts no liability for engine or coolant system failures resulting from pre-existing faults or wear present before installation.

10. Governing Law

This policy is governed by the laws of England and Wales. Any disputes shall be subject to the exclusive jurisdiction of the courts of England and Wales.

Contact

For any questions, contact us at info@fuelmarble.com or WhatsApp +44 7344 668989.