Can you really double your gas mileage?

[eb2559]

FAIL. You talked for a long time but gave no useful information. What did you even use?

[MikeWithBigTube]

thats alot of stuff to do and alot of money ur putting into ur car. this vid sounds like a scam to be honest. thumbs down

[anapeg100]

 Your link is a failure.

[victoriab123154]

I couldn't hook up to your link. It just goes to an emergency kit site.

[slapoutz]

you didnt even say what you used this is stupid dont watch this vid.

[utterube]

Nice to know what you tested.