Old and new oils cannot be mixed

During the operation of a tractor, some drivers fail to completely replace the used engine oil. Instead, they simply add new oil on top of the old oil and continue using it. They believe this practice can help save money and reduce operating costs. However, this is not a scientifically sound approach. In fact, mixing old and new oil doesn’t save anything—it can actually be harmful. The old oil contains a lot of oxidation byproducts, which, when mixed with new oil, accelerate the breakdown of the new oil. This reduces its effectiveness and shortens its service life. According to testing, if all the old oil is replaced with new oil at once, a tractor can typically run for about 1500 hours. However, if half of the new oil is mixed with half of the old oil, the performance drops significantly, and the tractor may only last around 200 hours. Moreover, the degraded lubricity of the old oil can lead to increased wear on engine components, black smoke emissions, and other issues that negatively impact the tractor’s overall performance and lifespan. Therefore, when the old oil has reached its expiration point, it must be fully replaced with new oil. This is the correct and effective way to maintain the tractor's efficiency and longevity. It not only helps in saving oil in the long run but also ensures proper maintenance and optimal functioning of the machine. Always follow the manufacturer's recommended oil change intervals to keep your tractor running smoothly and reliably.

Color Doppler Ultrasound Scanner

"Color Doppler Ultrasound Scanner" is a high-definition black-and-white B-ultrasound plus color Doppler. Its main advantages are: it can quickly and intuitively display the two-dimensional plane distribution of blood flow; it can display the running direction of blood flow; it is beneficial to distinguish between arteries and veins; it is beneficial to identify vascular disease and non-vascular disease; it is beneficial to understand the nature of blood flow ; It is convenient to understand the phase and speed of blood flow; it can reliably detect shunt and regurgitation; it can quantitatively analyze the origin, width, length and area of blood flow. These ultrasound manifestations and parameters play a very important auxiliary role in the diagnosis of clinical diseases.

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