[RandomFact314]

If you have ever looked up getting better MPG I'm sure you have seen these things, do you think they are a scam? Supposedly you stick them in your intake & they spin the air & that will for some reason give you better MPG. Some of the testimonies on these things report +1MPG, +4 MPG, +40% MPG exc. I think its bull, but for $30 it would be worth it if they did work...