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Old 06-08-2014, 09:59 PM   #11 (permalink)
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ecomodded's Avatar
Join Date: Jul 2011
Location: Vancouver Island, Canada
Posts: 1,189

Dusty - '98 VOLKSWAGEN Beetle TDI
90 day: 60.42 mpg (US)
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If it works you might see a 10-20 mile improvement in mileage per tank.

I sincerely feel a 25 mile test is not going to tell you anything , 0 , even if a graduated glass tube was used to measure there is not enough time for the effect to have effect.

I would expect you could gain about a 1/2 mpg ,reportedly my beetle with a roof spoiler is factory tested to improve the mileage by 1 mpg.

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Ride a Mtn bike for errands exercise entertainment and outright fun

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