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Improve gas mileage

Hi,

Has anyone tried this device (http://www…121&sc=384) for improving mileage? Does it work? Would it harm my internal combustion engine?

Works great! It’s also useful to stimulate hair growth!

Seriously, it’s a scam. We’ve had numerous threads on this.

Total Scam…Why don’t you buy one and report back on how well it works.