Will your car run on diesel fuel?
only if it has a diesel engine. A gasoline engine will not run properly on diesel fuel.
You are a farmer have dyed diesel fuel for tractor bought diesel car are you allowed to drive car on public road with dyed fuel?
Do NOT use Diesel fuel in a Ford Focus. The engine will stop running and you will have to drain the gas tank to rid the car of the diesel fuel. Gasoline engines are not designed to run on diesel. They do not have enough compression to cause the diesel fuel to combust The only engine used in a 2000 Ford Focus was the 2.0 which is NOT a diesel engine.