Modern fuel injected cars, no.
Ignition takes about 30 seconds worth of idling fuel
Acetone is often added to fuel to increase fuel efficiency and create a smoother idle.
the cylinders are tight and is pulling more fuel then normal on a efi motor, older cars,trucks with chokes pull more fuel till it is warmed up
If it is pumping at low pressure then yes, but the engine will just idle and not much more than that. If it does not pump at all, then no.
A lot of fuel is used to idle the car when stationary. The bigger the engine the more waste. Engines have specific speeds when they are most efficient, when not running at that speed some fuel is wasted. The energy to the wheels compared to the energy in the fuel is about 33%. Engines with turbo chargers use less fuel when stationary while still have the power available when needed. Hybrid cars can avoid some of the waste. Cars with stop start engines when the car is stationary save fuel. Electric cars has best efficiency from power in to power on the road.
There are many products that can be used as fuel for cars. These products are more natural and better for the environment than fuel. Yeast can be used to produce fuel for cars by breaking it down.
need more info but just guessing here vacuum leak causing high idle and dieseling cause by high fuel air mix why it will not shut off
check fuel filter, air filter, and spark. if that's ok start looking at sensors for a better answer, would need more info
Lighter weight, more aerodynamic, and more fuel efficient engines, transmissions, and tires.
most deisle cars and smart cars. *please add to this answer I know there's more
Cars will use more gas idling than starting the car.
Energy efficient cars are cars that gives you the most amount of travel for each unit of fuel that they use. The difference from conventional cars is that they give you more travel per unit of fuel than conventional cars do.