What is the first-cut oil?

[JackLynn]

First-cut oil refers to the oil produced by the crude oil vacuum distillation tower. The introduction of first-cut oil is as follows: 1. Introduction to first-cut oil: It is mainly divided into first-cut to fourth-cut according to different boiling points, with the boiling point increasing progressively. Among them, first-cut oil is the basic raw material for producing lubricating oil, and the first-cut oil is of better quality and can also be used for blending diesel. Compared with ordinary base oil, first-cut oil is a non-standard oil. Through processes such as solvent deasphalting, solvent dewaxing, solvent refining, hydrofining or acid-base refining, and clay refining, substances that form free carbon, low viscosity index substances, substances with poor oxidation stability, paraffin, and chemical substances that affect the color of finished oil are removed or reduced to obtain qualified lubricating base oil. 2. The main indicators of first-cut oil: density, freezing point, color, viscosity, flash point, etc.

[StLane]

Shock absorber oil, I think it's the specialized fluid inside the shock absorber, with its main function being to dampen vehicle vibrations. During everyday driving, this oil has high viscosity and can absorb the impact from road bumps, making the car run more smoothly. I've driven several cars, and if the shock absorber oil deteriorates, becomes thin, or leaks, the car will bounce noticeably, making long-distance driving particularly uncomfortable. Shock absorber oil is typically made from mineral or synthetic oil, with added anti-foaming and anti-corrosion additives, and generally has a service life of a few years. It's not very expensive, but don't overlook it, as it directly affects the efficiency of the suspension system. During regular maintenance, having a technician check the condition of the shock absorber oil is a good habit that can prevent major issues.

[Evan]

As a car owner, my understanding of shock absorber oil came from a repair experience—my car was bouncing terribly, and upon inspection, it turned out the shock oil was leaking. The technician explained that this oil is the 'lifeblood' of the shock absorber, responsible for cushioning impacts and ensuring the wheels stay in contact with the road. I realized it's not changed as frequently as engine oil, but once it fails, it can affect handling, such as unstable cornering or longer braking distances. When choosing, look at the viscosity rating; standard products are sufficient for regular models. Now, I also remind my friends not to overlook it, as small issues can accumulate and lead to major problems.

[LaylaMarie]

I've repaired many cars, and shock absorber oil is essentially a damping agent that operates inside the shock absorber's inner tube. When the vehicle encounters bumps, the oil absorbs energy through piston movement to prevent excessive body bouncing. Over time, the oil may leak or deteriorate, requiring timely replenishment or replacement. Otherwise, the suspension may fail, making the vehicle prone to losing control. It's recommended to inspect it every two years, especially for vehicles frequently driven on mountain roads. This isn't complex technology—simply put, it's fundamental protection for safe driving.