Dear voltarians after 1 decade and millions of miles with over 100.000 Volts, has someone installed a fuel tank drainage /plug or petcock? The harsh reality is that petrol sometimes is contaminated with solids and or water, that combined with the stagnation of the fuel in the tank will produce a layer of dirt at the bottom of the tank. In the Chevy Volt you have to remove the whole tank to inspect or change the fuel filter and to remove the tank, you have to remove the rear axle (in the chevy cruze part of the exhaust pipe). In most of modern cars you could reach the pump and filter through an opening under the rear seat, not in the Volt, that's why a kind of Fumoto valve at the bottom of the tank will be very helpful. I am aware of the fuel explosion danger, a drilling will have to be manual, low rpm without electricity or sparks, some threads mention the fuel tank is hard polyurethane (plastic?), other said is made of stainless steel. I know a less invasive approach will be to use a siphon system. In any case, I remember changing the fuel filters in the past, and all of them were black and many with huge amount of water. What is your opinion about this issue? Has anyone changed the fuel filter or placed a tank drain plug? Thank you, Voltspain.