best oil for Caterham Preparation of a sports car to participate in the races
Many drivers fascinated by this, how are designed sports cars. Indeed, the construction of such car is very precise and requires a vast knowledge in the field of automotive. The task of designers is to provide drivers with such equipment, which allows for a very fast ride in variable and difficult conditions. Maintenance of sports cars is done sometimes for such reasons with which ordinary driver radziliby themselves, but sports cars have such a structure, it is difficult to do anything with them yourself, otherwise when it comes to the race that the service was done quickly. A major role in sports cars also play a motor oil that protect the engine while working under difficult conditions.
Properties of engine oils
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
Check your car before you set off on a long journey
Summer is the time when we will be happy to travel. Many people choose when car - you can get quite big luggage, stop for a rest at any place, and on the way to visit all the interesting places that only see. However, this trip was a real pleasure, it is necessary to ensure the efficiency of the car. A thorough review before the trip is an excellent opportunity to catch any defects or prevent serious damage mechanisms and systems. So if you are planning a family vacation, remember about the car. In the end, the most important is the safety of our loved ones, and the only efficient car can provide it during the long route.