Anyone ever heard of mpg caps?

my neighbor gave them to me. they're supossed to improve mileage and power,prolong plug life, fuel filters and exhaust system and reduce emmisions. you put a capsule in the gas tank with every fill. i am not soliciting ! i want to know more. here's the e-mail if you want to take a look and tell me your thoughts. i'd be interested in the opinion of a pro. thanks


Driving Without Insurance, MOT and Road Tax?

Snake-oil. Don't work as claimed. The article at the website below will give you good information on it.

Can I place my external EZ-Pass tag on my back plate instead of in the front?

To really get more fuel mileage, change your driving habits such as accelerate from a stop at a slower more steady rate, turn off unnecessary accessories and maintain a steady speed as much as possible, and don't speed.

Which is the heaviest aircraft in the world [including freight 'passengers and fuel]?

So what are the capsules themselves made of, and how are they supposed to not gum up the fuel system when they dissolve?

What drives you really mad about car driving in the U.K?

Regardless, at best it would have a cleansing effect, if it were full of something like Seafoam. More likely it's pure snake oil.
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