As a dump truck driver, I often worry about this problem, and I have asked many friends that they are often stolen from oil, especially in the early morning to dawn, when people are the most tired and have the deepest sleep, the probability of stealing oil is also high. At this time, we usually park our car in the service area or loading point, and few people pass by, so stealing oil often happens. Later, I kept a dog in the car and raced with me, because the dog's hearing is very sensitive and it will remind me when there is any trouble. This anti-theft method is simple and active. The only drawback is that it often wakes me up and makes me feel very tired at night. Later, I chose to replace the anti-theft fuel tank cover and screen the mailbox to prevent oil thieves. In addition, I installed a baffle above the oil tank and a protective plate above the gasoline pipe joint, which also played a role in theft prevention.