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Tagged: 0 Thread(s). Quoted: 0 Post(s). The Prius gas tank is fitted with an internal bladder to prevent gas fumes from leaking into the air. It does create the problem of inconsistent gasoline fill-ups. 1 - The back pressure from the tank can cause early shutoff of the nossle. (don't overfill as gasoline can spurt out due to bladder pressure). 2 - In cold weather, the bladder gets stiff reducing the effective tank capacity. As was stated before the nominal tank capacity is 11.9 gallons.
By the numbers: the 2012 plug-in Prius. Over six days of drivingâlimited to around-town tripsâwe put about 103 miles on a fleet-test Toyota Prius Plug-In, averaging 90.8 miles per gallon. In that time, we gave the Prius Plug-In five full charges and two partial ones, and according to the trip computer, we covered 77.7 miles in EV mode.