
Here are the specific reasons for high vehicle fuel consumption: 1. Affected by temperature: Fuel consumption fluctuates due to temperature changes. In winter, when temperatures are low, fuel consumption tends to increase. 2. Long-term lack of vehicle maintenance: Dirty engine oil and air filters can also lead to increased fuel consumption. Dirty engine oil causes poor lubrication, increasing resistance in the engine's moving parts, which requires more energy to overcome, thereby raising fuel consumption. 3. Insufficient tire pressure: Low tire pressure increases the contact area between the tires and the ground, leading to greater friction and driving resistance, which results in higher fuel consumption. 4. Excessive carbon buildup in the vehicle: Carbon deposits can accumulate in the throttle body, fuel injectors, intake manifold, and piston tops. Excessive carbon buildup in any of these areas can cause incomplete combustion, leading to increased fuel consumption.

Anyone who has driven the Changan Honor knows that a sudden increase in fuel consumption might be due to driving habits. Small things like frequent rapid acceleration and hard braking, or driving with windows open at high speeds increasing wind resistance, can all waste fuel unnoticed. I also checked the tire pressure—if it's too low, it increases rolling resistance, making the engine work harder. A long-unreplaced air filter can easily clog the intake, affecting combustion efficiency. For older models, aging spark plugs not replaced in time can cause misfires, wasting fuel. Long idling times in city traffic naturally consume more fuel. It's advisable to develop smooth driving habits and regular maintenance, starting with simple checks like tire pressure and filters, and gradually troubleshooting the issue.

As a long-time owner of a van, I believe the high fuel consumption of the Changan Ono is often related to improper maintenance. Failing to replace the air filter or engine oil on time can cause the engine to work inefficiently and consume more fuel; insufficient tire pressure also increases friction resistance. Another common issue is aging spark plugs or ignition system failures, leading to incomplete fuel combustion, which is more noticeable in mountainous or bumpy roads. The design of the Ono performs decently on highways, but frequent stops and starts in urban areas can cause fuel consumption to skyrocket. Keeping regular maintenance records and checking the filters and fluids every 5,000 kilometers can effectively prevent this. If fuel consumption remains high, check sensors like the oxygen sensor to see if they are faulty, affecting the air-fuel mixture ratio. Don’t overlook the load issue—carrying too much stuff in the car adds extra burden. These measures can generally keep fuel consumption within a normal range.

My car repair experience tells me that a sudden surge in fuel consumption is often caused by minor mechanical issues. A faulty oxygen sensor can disrupt the engine's air-fuel ratio, burning more fuel without sufficient power; clogged fuel injectors spray unevenly, wasting fuel; and transmission system issues like gear wear increase resistance. The Changan Honor model often experiences air filter clogging, blocking the intake. First, check tire pressure and the filter condition to rule out these simple causes. If the onboard computer shows error codes, decode and address them promptly. Always adhere to regular maintenance schedules without delay.


