It is no exaggeration to say that the engine is the very heart of a car, and the engine oil that lubricates the engine and keeps it functioning is the blood of the car. Engine oil has five important roles: lubrication, sealing, cooling, clean dispersion, and rust prevention and corrosion prevention. The standard replacement distance varies depending on the vehicle type and condition, but in general, the usage status of Japanese vehicles is Since it often corresponds to severe conditions, it is desirable to replace it after traveling 5000 km or one year, whichever is shorter.
Let's carry out regular replacement and keep in mind a safe and secure drive.
エンジンオイルの役割
エンジンオイルの劣化
オイル交換の必要性と交換目安
Fluid? oil?
What's the difference between saying oil and fluid even though they are the same oil? ??
Actually, it is also called brake oil, but in English it does not necessarily mean oil in the sense of fluid = liquid / fluid. Brake fluid is the "liquid that fills the brakes", and although the structure of the brake is a basic hydraulic brake, it is also called brake oil, but the term brake fluid is more suitable. increase.
The role of brake fluid
The role of the brake fluid is to transmit the braking force applied to the pedal to the brake inside the wheel in the hydraulic brake, and it is contained in a container called "reservoir tank" in the engine room, from which it is stored. It is connected to the four-wheel brake via a part called "master cylinder". Brake fluid is extremely hygroscopic, so if it is used for a long period of time, it will take in the moisture in the air and deteriorate.
When it deteriorates, the original performance of the brake mechanism is lost, the brake becomes difficult to work, and in the worst case, the brake does not work at all due to a phenomenon called "vapor lock".
Brake failure directly leads to a major accident, so regular management and maintenance is important for oil deterioration and leakage.
Properties required for brake fluid
● Low viscosity.
● The change in volume due to pressure is small.
● Does not solidify at -50 ° C and does not boil at 200 ° C.
However, if moisture enters and deteriorates, the boiling point will drop and the brakes will not work.
Replacement guideline
Since the basic replacement standard is 2 years, we recommend that you replace it at the time of vehicle inspection.
The official name of the coolant is LLC: Long Life Coolant. Previously, we used what was called antifreeze, but due to its fast deterioration cycle, LLC is now the mainstream. In the case of antifreeze, ethylene glycol was the main component, but in LLC, rust preventives and oxidation inhibitors were added to ethylene glycol. Prevents corrosion of piping and extends the life of LLC itself. As the word "long life" is included, it can be used for a long time compared to the previous antifreeze station.
The role of coolant
Inside the engine, explosions are repeated to generate power, so the temperature becomes extremely high and a large amount of heat is generated. If the heat is not cooled, the engine will overheat and fail. Coolant (cooling water) plays an important role in cooling the heat generated by engine operation and preventing failure due to overheating by passing through pipes stretched around the engine. The coolant that receives heat from the engine is also called radiator fluid because it repeats the circulation of being cooled again via the radiator.
The following three points are required for the performance of the coolant.
1. Cooling performance : It absorbs the heat of the engine, carries it to the radiator, and releases the heat there.
2. Rust prevention performance : Since engines and radiators are made of metal, corrosion due to rust can cause malfunctions.
3. Antifreeze performance : If the coolant freezes, the volume will expand and damage the engine and radiator.
Replacement guideline
Since the performance of the previous antifreeze deteriorates in a few months, it was necessary to replace it several times a year, but after switching to LLC, it is a guideline to replace it once every two years according to the vehicle inspection time. increase.
