Crazy results. My Civic is pulling about 8 more MPG since I plugged this in. Didn't think a device this small could do that. 100% recommend.

Was skeptical going in, but after the first 100 miles the difference was obvious. My BMW 3 Series runs smoother and the trip computer keeps showing lower fuel use. Love it.

Got one for my wife's Mercedes C-Class diesel. She's getting close to 90 more miles per tank now. The install was honestly stupid easy.

Finally not stopping at the pump every couple days. Savings are real and you feel it in your wallet. Works great in my Chevy Cruze.

Throttle response on my Audi A4 feels way smoother and the MPG is up about 5. Genuinely impressed with the tech. Shipping was quick too.

A friend put me on to this. Best money I've spent on my Camry in a long time. You can tell the engine is running more efficiently.

I drive a ton of highway miles for work in my Ford Focus. The yearly savings the quiz showed me are basically spot on. Brilliant little product.

I drive an older Honda Fit and it still works great. My little runaround is even more efficient now. Couldn't be happier.

Installed in 30 seconds in my Mazda 3. No tools, no hassle. One week later: about 6 more MPG. Doesn't get easier than that.

I was sick of paying these gas prices. SynGas is the answer. My Hyundai Elantra is noticeably more efficient and I feel better about it.