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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.
I figure that with gas at $3/gallon, I save more in gas than the extra battery cost. At $2/gallon, it's about break even. If gas is below $2/gallon, the extra battery cost is greater than the gas savings. My conclusion is that with gas plunging below $2, it does not make economic sense to buy a Prius. Written Mar 14. Paul Woodhouse, bit of a petrolhead..