How to identify whether the oil in use needs to be replaced

Knowing when to change your engine oil is essential for maintaining the performance and longevity of your vehicle. But how can you tell if it's time for an oil change? Here are some simple yet effective methods to assess the condition of your engine oil:

1. Touch Test: Take a small amount of oil from the oil pan and rub it between your fingers. If it feels smooth and doesn't have a sticky or gritty texture, it's likely still in good condition. However, if it feels thick, sticky, or has a noticeable "draw" when pulled apart, this could indicate that the oil has degraded and needs to be replaced.

2. Dipstick Inspection: Pull out the dipstick and check the oil level and condition. Shine a light on the dipstick and look for a clear, consistent mark. If the oil appears dark, murky, or the mark is unclear, it may be contaminated or degraded, and it’s time to change the oil.

3. Visual Flow Test: Pour a small amount of oil from the oil pan into a clean container. Slowly pour it back out and observe the flow. If the oil flows smoothly and evenly without clumping or leaving behind residue, it’s likely still in good condition. If the flow is uneven, sluggish, or leaves behind a greasy film, it might be time for a change.

4. Drop Test: Place a drop of oil on a white piece of paper. Observe the color and spread. If the center of the oil spot is dark brown with minimal yellow seepage around it and no visible particles, it suggests the oil has deteriorated and should be replaced. On the other hand, if the center is lighter and the yellow seepage is more pronounced, the oil is still in good condition.

It's important to perform these tests while the engine is still warm and the oil hasn’t had time to settle. If you wait too long after turning off the engine, the oil may separate, making it harder to get an accurate reading. The oil floating on top might appear clean, but the degraded or dirty oil could be at the bottom of the oil pan. To ensure accuracy, always take samples from the surface oil immediately after stopping the engine.

Video Measuring Machine

The video measuring machine is based on CCD digital image, relying on the powerful software capabilities of computer screen measurement technology and spatial geometry operation. After installing the special control and graphic measurement software, the computer becomes the measurement brain with the soul of the software and is the main body of the whole equipment. It can quickly read the displacement value of the optical ruler, and obtain the desired result instantly through the software module operation based on the spatial geometry; A graph is generated on the screen for the operator to compare the image with the image so that the possible deviation of the measurement results can be identified intuitively.

video measuring machine is a high-precision optical image-measuring instrument composed of a high-resolution CCD color lens, continuous zoom objective, color display, video crosshair display, precision grating ruler, multi-function data processor, data measuring software and high-precision workbench structure.

The instrument applies to all application fields for two-dimensional plane measurement. These fields include machinery, electronics, molds, injection molding, hardware, rubber, low-voltage electrical appliances, magnetic materials, precision hardware, precision stamping, connectors, connectors, terminals, mobile phones, home appliances, computers (computers), liquid crystal television (LCD), printed circuit boards (circuit boards, PCBs), automobiles, medical devices, clocks, screws, springs, instruments, gears, cams, threads, radius templates, thread templates Wire and cable, cutter, bearing, screen, test screen, cement screen, screen plate (steel mesh, SMT template), etc.

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