What is the fuel consumption at an average speed of 30 km/h?
4 Answers
Maintaining a steady speed of around 30 mph generally results in a fuel consumption between 5-6 liters per 100 km. Avoid heavy acceleration and maintain a constant speed for optimal fuel efficiency. Correct fuel consumption calculation formula: Fuel consumed ÷ Distance traveled × 100 = Fuel consumption per 100 km. The data on fuel consumed is relatively difficult to obtain accurately. Typically, the method involves filling the tank to full as the initial data, then driving a certain distance and refilling the tank to full again. The fuel consumption is then calculated based on the refueling data provided by the gas station. Fuel-saving tips: Idling for more than 1 minute consumes the same amount of fuel as starting the engine once. Five minutes of engine idling consumes enough fuel to drive the car for over 1 km.
When the average speed is 30 km/h, fuel consumption is generally high. I've driven many cars and found that at such low speeds, fuel consumption can rise to 9-12 liters per 100 km. For example, my compact car, when stuck in daily city traffic with a GPS average speed of 28-30 km/h, shows a fuel consumption of around 10 liters. The engine can't run stably, and frequent starts and stops waste fuel; it's worse in poor road conditions, with many traffic lights or congestion—long idling times quickly empty the fuel tank. Previously, when I drove on the highway at 80 km/h, fuel consumption was only 6 liters, nearly half the city figure. Tips to save fuel? Try maintaining smooth acceleration, avoid sudden braking, lower the air conditioning, and ensure tires are properly inflated to help reduce consumption. Controlling the cabin temperature in hot weather can also save fuel. Remember, the car's age and maintenance condition also have a big impact—for instance, worn spark plugs lower combustion efficiency. In short, a 30 km/h average speed is typical for city driving, and higher fuel consumption is normal; recording your own car's data is more reliable.
When the average speed is only 30 km/h, the data I've seen indicates fuel consumption is approximately 8-15 liters per 100 km, depending on the vehicle model and environment. I understand some engine principles—at low speeds, combustion is incomplete, and unburned fuel is wasted. In city driving with constant stops and starts, the transmission is busy shifting gears, increasing energy consumption. For example, small-displacement turbocharged cars might consume 7-9 liters, while SUVs or larger-displacement vehicles can exceed 10 liters. In humid weather, slippery roads force the engine to work harder, slightly raising fuel consumption. Using the air conditioning, especially for cooling, is a notorious fuel guzzler, often adding around 2 liters. I recommend regular maintenance—clean engine oil can improve efficiency. Driving habits make a big difference; aggressive acceleration spikes fuel consumption, while gentle driving can keep it under 8 liters. Electronic aids like start-stop systems help, but ensure they function properly. Different models vary significantly, so pay attention to the reference values in the manual during test drives.
I've experienced an average speed of 30 km/h while driving, and it's normal for fuel consumption to rise above 10 liters per 100 km. When stuck in city traffic, the slow speed and prolonged engine idling cause fuel to drop rapidly. My small car usually consumes only 5 liters on the highway, but during morning rush hours with an average speed of 31 km/h, fuel consumption jumps to 11 liters. Temperature has a significant impact, with summer heat and air conditioning increasing fuel usage. Regular maintenance can help improve this—for example, replacing the air filter ensures smoother airflow. Driving habits are crucial: avoid tailgating and frequent stops and starts; for manual transmissions, shift gears at the right time to keep RPMs low. Don’t neglect tire checks—low pressure increases fuel consumption. Avoid carrying unnecessary weight; keeping the trunk empty saves fuel. Safe driving is also linked to fuel efficiency, with maintaining a steady speed being key.
