Does Coasting Save Fuel?

1 Answers
RicardoAnn
09/05/25 3:41am
Coasting does not save fuel. Whether it's an automatic or manual transmission vehicle, coasting in neutral not only fails to save fuel but can also damage the car's transmission. Below is some information about vehicle fuel consumption: 1. Fuel Consumption: Generally, typical cars are economical family vehicles. The fuel consumption per 100 kilometers for 1.0, 1.3, 1.6, and 2.0-liter cars is approximately 5L, 7L, 10L, and 12L respectively. However, fuel consumption is a complex factor influenced by the vehicle's performance, road conditions, and the driver's skill. 2. Methods to Save Fuel: The engine's temperature directly affects fuel efficiency. Both excessively high and low temperatures can lead to increased fuel consumption. The engine's operating water temperature should be maintained between 80°C and 90°C. Preheating the engine during cold starts can significantly save fuel. 3. Regular Maintenance: The intake system must be kept clean and unobstructed. The air filter should be frequently cleaned, the tension of all drive belts should be appropriate, tire pressure should not be too low, and brake shoe clearance should be regularly adjusted to avoid dragging.
Was this review help?
14
3
Share
More Forum Discussions

What are the effects of converting a car to natural gas?

After converting a car to natural gas, it may result in insufficient power, manifesting as sluggish acceleration, slow speed increase, and particularly noticeable effects when using air conditioning in summer. This is the most significant drawback. During idling, vibrations may increase, the car may feel underpowered, and climbing hills or overtaking can become more challenging. Additionally, the conversion costs are relatively high. Here is additional information: Relevant regulations: National standard natural gas products can fully ensure vehicle usage and safety. Official conversion points will modify the vehicle based on its original structure without compromising it. As long as regular car owners operate according to regulations, it will not affect the vehicle's performance, lifespan, or safety.
3
2
Share

What is the reason for the average fuel consumption number on the dashboard not moving?

The reasons why the average fuel consumption number on the dashboard does not move: Fuel float problem: For some older vehicles, the fuel float may malfunction. The fuel float is essentially the fuel level sensor. You can check if the fuel level sensor connector on the fuel tank is loose and observe whether there is any sticking during the sliding process of the fuel level sensor. Fuel gauge circuit issue: If the fuel level sensor is functioning properly, you need to inspect the fuel gauge circuit on the car dashboard. Use a multimeter and a pin to locate and test the corresponding fuel gauge circuit on the dashboard. The fuel gauge displays the amount of gasoline in the car. It is important to note that when the fuel gauge needle falls below the red line and starts to alarm, even though the car can still run for 30-40 kilometers, you should not wait until the fuel level alarm sounds to refuel.
8
2
Share

What are the reasons for diesel electronic injection engines failing to start?

Engine starting difficulty refers to a situation where the starter can drive the engine to rotate at normal speed, with obvious signs of ignition, but the engine fails to start, or requires multiple consecutive starts or prolonged cranking to start. For starting difficulty faults, it is necessary to distinguish whether they occur during cold starts, hot starts, or regardless of engine temperature. The cause of this issue generally lies in the fuel injection system. Fault analysis: During starting, the crankshaft rotates at normal speed, but it takes a long time to start, or there are obvious ignition signs but the engine fails to start. Possible causes include: air leaks in the intake system; fuel pressure too low; clogged air filter; faulty coolant temperature sensor; faulty air flow meter; faulty idle control valve or auxiliary air valve; cold start injector not working; leaking fuel injector; incorrect ignition timing; broken wiring from the starter switch to the ECU; too low cylinder compression pressure.
10
5
Share

Why does Subject 4 show the Subject 1 test site?

Subject 4 and Subject 1 share the same test site, using computers in the same room for the exams. Subject 1 is a theoretical test, while Subject 4 is a safe driving test. Although the names are different, both are computer-based exams conducted in the same test site. Subject 4 Tips: For true/false questions during the written test. True/false questions may involve identifying patterns, such as which operations are allowed and which are not. Additionally, questions that mention slowing down the vehicle or driving slowly are generally correct. Regarding car light questions. Check if the exam paper mentions turning on the high beams. Generally, Subject 4 rarely includes questions about using high beams.
11
4
Share

Starting Position for Reverse Parking?

Park the car with the left wheel aligned to the left side of the second dashed line. Stop when the side mirror passes the dashed line, then start without engaging reverse gear or releasing the handbrake. Quickly turn the steering wheel all the way to the left when the angle between the left side mirror and the car body allows you to just see the dashed line. Precautions for reverse parking: When reversing into a parking space, pay attention to the situation behind the car. You can use the rearview camera to observe the rear condition of the car to avoid scratches while reversing. Additionally, reduce speed during the process. Methods for reverse parking include U-turn reverse parking, garage reverse parking, turning reverse parking, and shifting reverse parking. A new method has been introduced—automatic parking technology, which allows the car to park itself into the garage with the press of a button.
19
4
Share

What does the bulb symbol on the dashboard indicate as a fault?

The reasons for the bulb symbol appearing on the dashboard: Bulb failure: The yellow warning light with an exclamation mark in the middle that appears on the dashboard is a minor fault, which may only require replacing a bulb. Issues like a damaged brake light, or less noticeable lights such as the license plate light, side marker light, or reverse light, can all trigger this warning light. Loose connection: Apart from a possible bulb failure, it could also be due to a loose connection in the lighting system. This is easy to diagnose—simply check which light isn't working to quickly identify the fault. A loose connection in the wiring can increase the resistance in the lighting circuit, causing the dashboard computer to mistakenly interpret it as a bulb malfunction. Wiring issues: Poor contact in the wiring. Filament problem: The bulb's filament is partially broken or on the verge of breaking.
5
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.