How Much Fuel is Consumed at Idle?

[McAngelina]

Generally speaking, when the engine is in a warmed-up state, a typical 1.5L engine consumes approximately 14 milligrams of fuel per cycle. Here are the details: 1. Specific Calculation: Assuming an idle speed of 800 revolutions per minute (rpm), since a four-stroke engine completes one cycle every two revolutions, an idle speed of 800 rpm equals 400 cycles per minute, which means 400 fuel injections per minute. Therefore, the fuel consumption per minute is 5.60 grams, resulting in an hourly fuel consumption of approximately 340 grams (0.34 kilograms). 2. Cold Idle: If the car starts idling in a cold state, the fuel consumption during one hour of idling will be significantly higher. For example, under low-temperature conditions in winter in northeastern regions, the system may employ enriched injection to maintain stable idling. Normally, the engine might inject 10 milligrams of fuel per cycle at idle, but under cold conditions with poor fuel atomization, the injection amount can reach around 50 milligrams per cycle.