Never, it's a scam to get $5.00 from you at Auto zone.
Fuel pump pressure depends on which fuel system the car has. If your car has a carburetor then the fuel pressure should be 9 - 13 psi. If your car is fuel injected then the fuel pressure should be about 45 psi.
This depends in the make of the hybrid car, but generally you can use regular unleaded fuel in your hybrid car without having an issue with your car. It is best to consult the deal about fuel before making a purchase.
No, water is not a fuel.
As far as a I know methane Ch4 is not used in car fuel , it is octane which is used in car fuel C8H18 .
From fuel used in car
yes
no
Airplanes have a unique engine that can only run on a certain fuel and if you put it in your car it wouldn't be able to burn it. :)
Petrol
the fuel filter on that car should be under the car just in front of the passenger rear wheel
It should be diesel fuel in a diesel car - in the US and Europe, that will be #2 Ultra Low Sulphur Diesel.
they should because otherwise the car won't move