Why is ethanol gasoline in northern Jiangsu?

Ethanol gasoline is used in many places in China. I have been to Northeast China and Shandong Province. So there appeared a post on the Internet introducing the careful use of ethanol gasoline. It's just that there's something wrong with the gasoline car with ethanol. I think the person who said this either didn't pretend to understand or was entrusted by the maintenance station. He just wants to make money cleaning the oil circuit. In fact, adding ethanol gasoline is not terrible, but he should also know some common sense. 1. The content of ethanol in ethanol gasoline for vehicles is 10% (national standard), but it is not directly added with the alcohol we usually use, but specially treated. 2. When using ethanol gasoline, you need to pay attention to: a. Ethanol has strong water absorption. There will be some trouble if there is water in the oil circuit, but fortunately, most gas stations are more formal and should not be a big problem. B ethanol can swell a small amount of rubber products, and automobile manufacturers will consider it. C. ethanol has a cleaning effect on the automobile oil circuit. The conclusion drawn from the above two points is that adding ethanol gasoline has no effect on the use of vehicles, especially new cars. You don't have carbon deposits in the first place, and it is even less likely to produce carbon deposits with ethanol gasoline. It is not a big problem for cars with long mileage to burn ethanol gasoline. Even if the ethanol in ethanol gasoline dissolves the carbon deposit, it is a gradual process. Moreover, the dissolved carbon deposit is not a stone, and it will basically not block the fuel nozzle. Of course, if you are not at ease, you can also go to the maintenance station to clean the oil circuit, but it is a waste of money for most cars. To sum up, if you are a new car, you can consciously add a little ethanol gasoline frequently, which can reduce the chance of carbon accumulation in your car, and you don't have to clean the oil circuit and nozzle according to the requirements of the maintenance station in the future (the throttle still needs to be cleaned), at least you don't have to do this maintenance often.