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Originally Posted by mightyepp
One of my friend's dads does something similar and swears by it. He is currently testing it out as well and is going to tell me the results. But he claims more drastic changes in fuel economy than 2mpg, more like 15mpg. If it pans out I'll throw it on here and we can combine all these products for the most fuel efficient vehicle ever.
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Even better than that. Put a clothes pin on the fuel line.
Works every time.
