I think I seen some calculation where it said that an engine uses the same amount of fuel to start as it does to idle five minutes. I don’t know if that was average, a specific engine, or if it referred to gas or diesel though.
I think that used to be true on older cars, but with modern passenger cars emissions/fuel use for start up is about the same as 10s of idle. No clue if that’s true for these big diesel vehicles tho.
Idling diesel is supposed to be very bad but long haul trucks are better at it because they need to keep refrigeration running. Either way, something like 2 minutes of idle is almost universally worse.
Modern ICE passenger cars even automatically turn off their engine at traffic lights. Engine startup has become so reliable that the car can guarantee to spin up the engine and resume applying engine power the moment you press the gas pedal.
I think I seen some calculation where it said that an engine uses the same amount of fuel to start as it does to idle five minutes. I don’t know if that was average, a specific engine, or if it referred to gas or diesel though.
I think that used to be true on older cars, but with modern passenger cars emissions/fuel use for start up is about the same as 10s of idle. No clue if that’s true for these big diesel vehicles tho.
Idling diesel is supposed to be very bad but long haul trucks are better at it because they need to keep refrigeration running. Either way, something like 2 minutes of idle is almost universally worse.
Modern ICE passenger cars even automatically turn off their engine at traffic lights. Engine startup has become so reliable that the car can guarantee to spin up the engine and resume applying engine power the moment you press the gas pedal.