The device claims to save you 30-35 percent on fuel costs, but here’s why it’s a scam and doesn’t actually work.

I clicked on a Youtube video the other day and the first ad I had to sit through was a video for the EcoBox Fuel Saver, an OBD2 device you plug into your car’s OBD2 port that automatically calibrates your car’s fuel consumption to use less fuel.

The Ecobox OBD2 fuel saver device is a scam, does not work the way it’s advertised, is a complete waste of money, and should be avoided at all costs.

Here’s why.

Fuel saver OBD2 devices are only programmed to display a flashy LED show.

These types of OBD2 fuel savers and this exact design (shape, color, and advertising) have been around for years and have all been debunked as nothing more than OBD2 dongles that play a specific sequence of LEDs.

Check out these two videos from EEV Blog and Big Clive,

Both videos first show how, when powered on by an external power supply and not an actual car, the OBD2 dongle plays a specific yet convincing LED light show meant to fool its user into thinking this device is actually “talking” and “tuning” your car’s engine for better fuel efficiency.

As definitive proof, EEV Blog shows a blown up close look at the actual chip, pointing out how it’s not possible for the device to “talk back” to the car’s engine via CAN BUS. Specific lines that are supposed to be connected to CAN BUS are not even connected (there’s no soldering,) at all.

With no way to “talk” to your car’s ECU and engine, there’s literally no way for this device to “tune” your car for better fuel efficiency.

There are legit OBD2 devices that re-flash your ECU for more power or better fuel consumption, but that type of programing is manufacturer and vehicle-specific that requires proprietary information and know-how.

It’s impossible for simple devices, like the EcoBox ECO OBD2 plug-and-drive tuning box, to tune every single vehicle make and model for fuel savings with a generic OBD2 device.

Are or even a legit sites?

Clicking on the Youtube ad I was forwarded to advertising the EcoBox fuel Saver.

Two red flags pop up.

For one, the domain name was literally created seven days ago. It’s a fly-by-night type of site.

Next, their success story from “Paul, the cab driver” uses a photo owned by the Boston Globe (story linked here.) The actual cab driver’s name is Celestin, and the story is about banks loans.

It’s a similar story with, this site was created in June 2021.

The real reason EcoBox Eco OBD2 fuel saver is being advertised to you.

The real reason you’re seeing ads for fake fuel savers now, more than ever, is that gas prices are at record highs.

Whoever created the EcoBox Eco OBD2 fuel saver is trying to take advantage of this news, advertising a device that delivers 30% fuel savings (which is 15% more than the devices in the videos above.)

Simply put, do not buy the EcoBox Eco OBD2 fuel saver or any similar looking type of device.

These re-branded OBD2 Fuel Savers and their websites are created soley to rip off naive internet window shoppers.

It’s a scam!

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  1. How do they get by with total BS on a product like this. It doesn’t even make sense the it could work on all cars always. Not to mention if it worked it would alter the emission check. Just a flashing LED and does nothing else. Save your money for the next fillup.


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