[JSH]

Originally Posted by Cryptinox

I am curious if anyone here has ever tested tuner chips that have claims of improved fuel economy. I have seen mainstream ones and this one that seems a bit more sketchy.
https://shop.proecofuel.com/page/che...c3=signaltrndy

You can tune a car to increase fuel economy. However, in general, the ones that actual work are illegal and increase emission levels to achieve those fuel savings. If the manufacturer doesn't say it is EPA certified or has a CARB executive order number the tune is illegal to use on-highway.

However, those tunes are specific to your car. Anything that says it can be plugged into the OBDII port of any car and reduce fuel consumption by 15 - 30% is snakeoil.