Oktane One OBD Device for Petrol & Diesel Cars

• Reserve yours from our first production run. Expected ship date: 15 December 2026.
• You can cancel anytime before it ships for a full refund.
• If the date changes, we email you right away, and you can keep your order or get a full refund.
• We ship worldwide. Delivery takes 6–12 business days in Europe and 8–14 in the US after shipping.

Oktane One plugs into your car's OBD port, the diagnostic socket under the dashboard of most cars built since the early 2000s. It works with your car's engine computer in the background while you drive.

To see the difference, reset your trip computer and track your average consumption (L/100 km or MPG) over your next few tanks.

Oktane One is designed for petrol and diesel cars with an OBD-II / EOBD port. We publish a compatibility list by car model as testing continues.

Not sure? Ask us before ordering with your car's make, model, year and engine. If it doesn't work with your car, you get a full refund, return shipping included.

We publish fuel test results per car model and share our certification documents on this site as soon as they are officially issued. If we can't show it, we won't claim it.

How to tell a real fuel-saving product from a fake

• 30-day returns after delivery.
• Full refund if it doesn't work with your car.
• 2-year warranty against defects.

Return policy · FAQ