best oil for Infiniti How much is the service cars?
As you know, the price for servicing the car can sometimes be so high that a big surprise for the owner of the car. Very important is the reasonable choice of service centers, because in this area can often lead to fraud, and the potential client is not able to verify whether they were actually carried out such repairs in the car, for which he paid. The price for servicing the car depends not only on the model of the car, but also on how old our car. What's more, the price for such replacement auto parts is also dependent on the complexity of this process and on how much time the mechanic must devote to bring the car to its former glory.
Where to go to repair the car?
Sometimes our cars require repairs. Some faults and failures happen to all of us, but this does not mean immediately that our car is bad. Some of them simply can not be avoided, if one already happens, you should react. Some of them you can fix in just a few hours, but others require special equipment and skills that have only appropriately trained specialists in this field. The best places to give our car that was repaired as it should? A suitable place will be proven mechanical workshop and find them now very much. Just ask your friends or search ads, and all it will take us a little time.
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%.
Źródło: https://en.wikipedia.org/wiki/Motor_oil