In the scorching summer, air conditioning is always by our side when driving, like a sweet spring in the desert, yet it also quietly consumes fuel. For every 100 kilometers, fuel consumption quietly climbs by as much as 1-2 liters. In winter, the warm air inside the car brushes against our faces, bringing a cozy warmth, but it actually originates from the coolant, representing a redistribution of the engine's inherent heat, without the need for a compressor. Logically, fuel consumption should remain stable. However, attentive drivers often notice that winter fuel consumption not only doesn't decrease but is similar to that during summer with air conditioning. In spring and autumn, when there is no additional burden, fuel consumption quietly rises by 1-2 liters. What is the mystery behind this? Upon closer examination, there are approximately five reasons.

Firstly, in the severe cold of winter, the engine needs to ignite a blazing flame to maintain its optimal operating temperature, just like a warrior donning armor to become fearless and heroic. The useful work of the engine lies in converting the energy from burning gasoline into mechanical energy through the reciprocating motion of the piston. However, this process inevitably results in losses, which are transformed into heat energy and dissipate with the wind. The optimal operating temperature set for the engine is precisely 90 degrees Celsius, which is the essence of a heat engine. Only at this temperature can the components work seamlessly and the oil flow smoothly, fully demonstrating its lubricating effect. Therefore, the engine must reach this temperature to operate smoothly. Otherwise, the ECU, like a wise person, will instruct the fuel injector to generously dispense more fuel to enhance the firepower and help the engine quickly heat up. However, due to the cold surroundings, the heat dissipates like flowing water, merging into the cold atmosphere, resulting in a long journey to heat up and requiring energy consumption to maintain it. This is similar to having a picnic in summer, where the water boils between one's fingers, but in winter, it takes more than a moment and the consumption of firewood also doubles, all because the heat dissipates into the surroundings and vanishes into thin air. In the severe cold of winter, the engine loses heat, which can only be compensated by burning more fuel. Naturally, fuel consumption remains high, which is the most crucial and unavoidable issue.

2. Misuse of warm air: Invisible consumption under the warmth of winter

Incorrect use of warm air is akin to an untimely cold wind in winter, silently eroding the efficiency and energy-saving capabilities of your car. There are two fallacies involved:

Firstly, like a traveler eager for quick results, one hastily turns on the heater when the car is still immersed in the morning frost. This action is akin to placing a heavy expectation on the engine, which needs to wake up leisurely, forcing it to accelerate out of its slumber, thus greatly extending the lengthy journey of warming up the car. This journey is precisely the critical moment when fuel consumption surges like a tidal wave. Admittedly, the heater is a clever use of the engine's residual heat, requiring no generous donation of extra fuel droplets. However, this beautiful cycle is built upon the foundation of the engine having accumulated a warm embrace. If the engine itself is already in poor condition, and you forcibly deprive it of its only warmth, then the engine has to struggle to sustain this prematurely extracted warmth at the cost of doubled fuel consumption.

Secondly, it is the undue attachment to the defogging mode, akin to an excessive craving for security. When defogging, the air conditioning (AC) compressor springs into action, akin to a valiant warrior stepping forward, yet also imposing a heavy burden on the engine. This extra load translates into a slight consumption of fuel, silently illustrating the delicate balance between efficiency and convenience. Therefore, on that clear day with high clouds and no fog inside the car, we no longer need to frequently use the defogging mode. It should be promptly adjusted back to a quiet corner, allowing our beloved car to travel lightly on the path of energy conservation and comfort.

3. Decrease in tire pressure leads to increased fuel consumption

Studies have shown that for every 10% decrease in tire pressure, fuel consumption quietly climbs by approximately 2 percentage points. If the tire pressure is nearly depleted, such as reaching as low as 1.4 bar, fuel consumption may even soar by 8 percentage points. In summary, there seems to be an invisible rope between tire pressure and fuel consumption, with lower tire pressure leading to a more significant increase in fuel consumption.

Those who ride bikes have a deep understanding of this. If the tire pressure is insufficient, every pedal push feels like carrying a heavy load, making even the flattest roads seem arduous. However, once the pressure is adequate, pedaling becomes smooth and effortless. As winter approaches and temperatures plummet, the principle of thermal expansion and contraction inevitably leads to a decrease in tire pressure. If the tire pressure is not checked in time and allowed to run low, fuel consumption will inevitably rise.

4. The degree of warming up the car and the concern about fuel consumption

In the severe cold of winter, warming up the car is indeed necessary. However, one should not linger too long when warming up. Some people have ample time, so they warm up the car for a long time until the idle speed stabilizes and the water temperature warms up before setting off. Little do they know that this action burns fuel in the engine while it is stationary, and the fuel consumption increases before even driving a mile. What's worse, if each journey is short, the fuel consumption becomes even more troublesome. The key to warming up the car lies in moderation, which can both warm up the car and save fuel money.

5. Subtle regulation by the hand of environment

In winter, snowflakes swirl and fog swirls, intertwining to form a hazy picture scroll, yet also quietly laying a layer of challenges for the driving road. Visibility is like a shy girl, half-covered and half-revealed, while the road surface transforms into an ice rink, smooth yet tempting to be cautious. In such a season, drivers seem to wear cautious armor, moving slowly and deliberately, accelerating and decelerating like delicate dance steps, frequently and gently outlining a slow-motion melody on the ground. This series of cautious actions, like countless streams converging, inadvertently propels the boat of fuel consumption to climb.

What's more, the rubber beneath the tires becomes rigid in the embrace of cold, as if it has lost its former tenderness and elasticity. When rolling, the resistance doubles, and the friction is equally fierce, like two warriors engaging in a silent battle on the battlefield. Occasionally, the tires even play a mischievous trick of skidding on the ground, adding a significant contribution to the increase in fuel consumption.

However, all these seemingly insignificant factors, like a drop of water percolating through stone, accumulated over time and ultimately produced a significant cumulative effect, causing the overall fuel consumption to skyrocket like a runaway horse. But even so, we are not helpless. Grasp those details that we can control, such as shortening the lengthy time of warming up the car in place, keeping the tire pressure high like a warrior, improving our driving skills to make it smooth like flowing clouds and rivers, and then correctly using the gentle power of warm wind, the path of fuel consumption will descend steeply like a cliff, saving us valuable resources.