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Old 05-29-2012, 04:50 PM   #8 (permalink)
Master EcoModder
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Join Date: Jan 2008
Location: Western Wisconsin
Posts: 3,903

honda cb125 - '74 Honda CB 125 S1
90 day: 79.71 mpg (US)

green wedge - '81 Commuter Vehicles Inc. Commuti-Car

Blue VX - '93 Honda Civic VX
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What car do you have that has a vented gas cap? mine has a check valve so it can let air in to replace the fuel that is being used, but it doesn't let air out, the only way for air to escape is via the evap system where the fuel vapors are stored then burned when the engine is running.
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