For fuel, I don't think they would do anything useful. But for oil, it can catch metal particles. In fact, a lot of transmissions already have internal magnets for that purpose.
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If America manages to eliminate obesity, we would save as much fuel as if every American were to stop driving for three days every year. To be slender like Tiffany Yep is to be a real hypermiler...
Allie Moore and I have a combined carbon footprint much smaller than that of one average American...
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