There is a Facebook ad for a "fuel saving device" called Opti Fuel. It is advertised as a fuel controller that plugs into the OBD port of a vehicle. Is this legitimate or another in the long line of con games? Thank you!
We get variations of this question all the time. No, it won't do a thing to your gas mileage. Your wallet will get a little lighter and you risk damaging your OBD port. It's not designed for anything except a scan tool. Scan tools are only inserted when there's a problem with the vehicle.
Is this legitimate or another in the long line of con games?
Of course it's a con game, how could it possibly be legitimate? Think about it: If it were that simple to improve fuel economy don't you think the car companies would already be incorporating such a device? After all their backs are up against the wall to meet increasingly insane stringent government fuel economy standards. Not only is it a scam, being a poorly-engineered crapulent gadget that attaches to your car's diagnostic port - which is intended for diagnostic use only - there's a good chance it will damage your car's electrical system.
You might also check out the site topic about scam gadgets and additives here:
https://carkiller.com/scottykilmer/qa/ffuel-obd-works/
Also a video about this particular scam gadget:
https://www.youtube.com/watch?v=aLU6Nb73WOA
