Hybrid Cars & Alt Fuels

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Tamper proof

by Christine & Scott Gable

for About.com

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Read more: Driving the 2009 Audi Q7 TDI

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Audi Mileage Marathon fuel door seal

This fuel door seal is affixed to every car after refueling in the Audi Mileage Marathon.

© Scott Gable

Read more: Driving the 2009 Audi Q7 TDI

Hybrid Cars & Alt Fuels

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