Possibly. The main thing it can cause is severe engine wear. Too much oil is just as bad as too little.
Effectively all the fuel that it burns while idling. You are getting 0 miles per gallon while idling.
There can be many reasons why a car surges while idling. Some of these reasons are the computer could be dying, or the fuel injector are giving the engine too much gas.
It depends on the truck ie;a volvo 780 burns 7.0 gallons in 10 hrs.
Timing to high / advanced to far. Idling to fast. This can cause that problem.
It could take an estimated 1/2 gallon to 1 gallon idling for a hour.
that depends on size of engine
30 seconds of idling equals one average start, on a normally-functioning start.
The only stats I have are for a carburated GM 350. With no A/C running, and no other major drains on the car, it's only about a quart of gasoline an hour.
Enough to get the level to the safe zone on the dipstick while idling in park. It depends on why you are adding. If you changed the filter in the pan, start with 4 quarts.
4.7 liter per/hour
It is over charged and builds to much pressure on the high side when the engine is at a higher RPM. Need to remove some feon.
I'd suggest getting the Idle Air Control Valve checked. On most modern engines, the IACV can be adjusted yourself with basic tools. Some are adjusted by simply turning a screw, whereas some you may have to unscrew a small unit, and twist the inside spring. The IACV adjusts how much air is mixed with the fuel while the engine is idling. Not enough air will cause the engine to shake, as it struggles to keep going; while too much air will cause the engine to over-rev, or "breathe" (alternating high and low revving).