How to care for your car?
Historically, the car was a mostly a sign of prestige and status of the property owners. Today the car is primarily practical importance - we use it every day commuting to work, shopping or drive children to school or extracurricular activities. But in order to be able to enjoy the use of the car for many years, it is necessary to take care of him. Changing the oil on time, brake pads and other wearing parts during normal operation despite appearances, can greatly extend the life of the car. It should also be remembered that such regular maintenance is also the issue of safety of the driver and passengers, so it can not be taken lightly and put off.
Another manipulated property
Most motor oils are made from a heavier, thicker petroleum hydrocarbon base stock derived from crude oil, with additives to improve certain properties. The bulk of a typical motor oil consists of hydrocarbons with between 18 and 34 carbon atoms per molecule.7 One of the most important properties of motor oil in maintaining a lubricating film between moving parts is its viscosity. The viscosity of a liquid can be thought of as its "thickness" or a measure of its resistance to flow. The viscosity must be high enough to maintain a lubricating film, but low enough that the oil can flow around the engine parts under all conditions. The viscosity index is a measure of how much the oil's viscosity changes as temperature changes. A higher viscosity index indicates the viscosity changes less with temperature than a lower viscosity index.
Motor oil must be able to flow adequately at the lowest temperature it is expected to experience in order to minimize metal to metal contact between moving parts upon starting up the engine. The pour point defined first this property of motor oil, as defined by ASTM D97 as "... an index of the lowest temperature of its utility ..." for a given application,8 but the "cold cranking simulator" (CCS, see ASTM D5293-08) and "Mini-Rotary Viscometer" (MRV, see ASTM D3829-02(2007), ASTM D4684-08) are today the properties required in motor oil specs and define the SAE classifications.
Oil is largely composed of hydrocarbons which can burn if ignited. Still another important property of motor oil is its flash point, the lowest temperature at which the oil gives off vapors which can ignite. It is dangerous for the oil in a motor to ignite and burn, so a high flash point is desirable. At a petroleum refinery, fractional distillation separates a motor oil fraction from other crude oil fractions, removing the more volatile components, and therefore increasing the oil's flash point (reducing its tendency to burn).
Another manipulated property of motor oil is its Total base number (TBN), which is a measurement of the reserve alkalinity of an oil, meaning its ability to neutralize acids. The resulting quantity is determined as mg KOH/ (gram of lubricant). Analogously, Total acid number (TAN) is the measure of a lubricant's acidity. Other tests include zinc, phosphorus, or sulfur content, and testing for excessive foaming.
The NOACK volatility (ASTM D-5800) Test determines the physical evaporation loss of lubricants in high temperature service. A maximum of 14% evaporation loss is allowable to meet API SL and ILSAC GF-3 specifications. Some automotive OEM oil specifications require lower than 10%.
What kind of car parts worth buying?
In every car, even the most reliable, comes in the end time for the replacement of some parts. There is nothing surprising in this. Brake pads wear out during operation, as well as other elements of the mechanism. In this case, it is extremely important to select the appropriate part of the vehicle. Some decide to genuine products, others choose replacements, most important, however, it is quality. Certainly not worth saving for something that can give us security - even if we spend less on pads or brake discs, this is certainly more important to our health, which often depends on the efficiency of the car. The best solution is to consult an experienced mechanic who can help choose the best in our situation auto parts.