It depends on what year, you're talking about. It varies from year to year.
Yes, the Ford Focus has good fuel economy. The US Department of Energy has rated the Ford Focus Electric as a top most fuel efficient vehicle as 105 Fuel Economy Combined. The Ford Focus FWD has gas mileage values of 27 in the city, 31 Combined, and 38 on the Highway.
The new Ford Focus equipped with the Super Fuel Economy (SFE) Package combines sporty driving and fuel efficiency with a 40-mpg hwy fuel economy rating.
On a 2007 Ford Focus : That is the " upshift " light To maximize fuel economy , when the light comes on shift to the next higher gear
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 2013 Ford Focus runs on flex-fuel (unleaded/E85).
The 2014 Ford Focus runs on flex-fuel (unleaded/E85).
The 2012 Ford Focus runs on flex-fuel (unleaded/E85).
The Ford Focus 2004 ZTS has a 14 gallon fuel tank.
A ford focus does not have a diesel fuel filter. It runs on regular fuel. Preferably 87 octane
it comes on to tell you when to shift for best fuel economy
http://myfordfocus.com/how-to/fuelfilter.htm this will show you the fuel system.. fuel pump is inside the tank how to no if my fuel punp goimg out on 2001 ford focus