Hello everyone, I'm Xiao Li. Recently, I found that when the family drove back and forth to her hometown, unless she was in a hurry, she never got on the highway, at first I thought she was afraid to get on the highway, who knew that she said that the highway is easy to drive, but after getting on the highway, it feels more fuel-efficient, and the national highway saves fuel and tolls, which is much more cost-effective. In fact, many people feel that the average fuel consumption of the car is getting higher and higher after driving on the highway, but it is not clear what is going on. Old drivers say that fuel consumption is lower after getting on the highway, so everyone wonders if it is caused by their own driving skills. Today, Xiao Li will talk to you about this problem from the perspective of an insider, in fact, some cars will be more fuel-efficient after getting on the highway, don't be stupid to think that running at high speed is more fuel-efficient.
Everyone should know the legendary "three mothers" on the road, right? The reason why there is such a description is not that these cars can't run fast, I can run up with a 1.0T engine, not to mention that those cars are models with a displacement larger than 1.0T, like Corolla has a displacement of at least 1.2T, Sylphy has a displacement of 1.6L, and Lavida also has models with good displacement, the smallest of which is larger than my 1.0T. But a lot of people drive these cars slowly on the road, especially on highways. The fundamental reason is that when these cars run at high speeds, if you run 120 kilometers per hour at a normal speed, then its fuel consumption will be higher than running on national roads, but driving a little slower, after driving 90 to 100, fuel consumption is lower than national roads. The people who buy these cars buy them to save fuel, and they definitely want to save fuel when they run at high speeds, so they run slowly.
In fact, not only the legendary "three mothers" on the road, but also the 1.5L Toyota Vios I drove, and the 1.0T Buick Yinglang driven by my family, these small displacement cars will have higher fuel consumption than the national highway after getting on the highway. Because the displacement of the engine is fixed at high speeds, the fuel consumption of the engine is directly proportional to the power output and the speed of the engine. If you want to drive the car to a speed of 120 kilometers per hour, you have to step on the accelerator deeply to make the engine work more intensely, and pull up the engine speed to exert more power, the higher the speed, the greater the fuel consumption of the car. If you drive this type of car at high speeds and don't keep it at a constant speed, then its fuel consumption will remain high.
Just like the horses that people rode in ancient times, even if it is the so-called sweat BMW, it can run faster than ordinary horses, but it also has an economic speed, according to the economic speed of this kind of horse to run, it can run farther after eating, but you are in a hurry to pump all the way, it can only maintain a speed of more than the economic speed for a long time to run, physical consumption is faster, and it may even be exhausted. Our car is not like a horse, even if it is a car with a small displacement, it will not be tired, but when the economic speed exceeds it, it will consume more gasoline. The economic speed of ordinary small-displacement models is often between 80 and 100, and you drive 120 far beyond the economic speed, and the fuel consumption is naturally high. When running on national highways, many people can maintain a speed of about 60 to 70, which is very close to the economic speed, so the fuel consumption is lower when running national highways.
The old driver said that after the car is on the highway, the fuel consumption is lower, which is not fooling people, but the premise is a large displacement engine. For example, when the 2.5L Camry runs on the national highway and the city expressway, the fuel consumption may be 7 to 8 liters, but after getting on the highway, it can be as low as about 5 to 6 liters. This kind of car is too slow on the national highway, and it has not played the performance of the engine, and the speed of 120 kilometers per hour after getting on the high speed is the economic speed of others, so the fuel consumption is very low. When the Toyota Vios I drove was running about 100, the engine speed was only about 2,050, and the output was about one-third of the power, but when it ran to 120, the engine speed was directly pulled to more than 3500, and the engine output exceeded 50% of the power, and the fuel consumption would be greater if it went up.
Therefore, after we drive on the highway, if you find that the average fuel consumption of the car's instrument display is slowly rising, don't feel strange, you can only say that the engine displacement of your car is relatively small, and it will be more fuel-efficient to run at high speed, which is a normal phenomenon. If you're a car with a large displacement, you'll notice that the average fuel consumption is slowly decreasing.
In general, it is necessary to keep fuel consumption low after getting on the highway, keep driving at a constant speed, accelerate sharply, and apply the brakes less. If you are a small displacement car below 1.5, then if you want to save fuel and money, it is more cost-effective to take the national highway, taking the high-speed can only save time, not money, even if the high-speed is free, you will have to spend more fuel money. I want to remind everyone, don't drive at a turtle speed on the highway in order to save that little fuel money, drive on the highway, our speed must follow the flow, use the speed to maintain the distance between the front and back, this speed is the safest speed, the turtle speed is definitely the most dangerous speed, remember.