The 2010 Ford Focus runs on regular unleaded.
According to the ( 2010 ) Ford Focus Owner Guide : The fuel tank holds ( 49.2 litres )
You will need to remove the gas tank.
49.2 liters ( 13 U.S. gallons )
There is no carburetor on a ford focus. They are all Fuel Injected.
The ford focus is fuel injected and does not have a carburetor.
The 2014 Ford Focus runs on flex-fuel (unleaded/E85).
The 2012 Ford Focus runs on flex-fuel (unleaded/E85).
The 2013 Ford Focus runs on flex-fuel (unleaded/E85).
DROP THE FUEL TANK!! Second time for this answer, at least. Go read the FAQs.
it is near the fuel tank, if you want to install new one you have to completely remove the fuel tank.
The Ford Focus 2004 ZTS has a 14 gallon fuel tank.