Sliding oils are all-season oils that, among other things, have components added to reduce friction inside the engine. Sliding oils are created on the basis of so-called synthetic oil that reduces friction. It is necessary to pay attention to the fact that this oil is produced by Ford (it is on the container).
Lubricant additives - no matter what type - must not be added to either fuel or motor oil.
Purpose/Viscosity Classes
Flowability or viscosity is classified according to the SAE (Society of Automotive Engineers) system, such as SAE 30, SAE 10, etc. High SAE numbers mean high oil viscosity, low numbers mean low viscosity. Depending on outside temperatures, different oils are required, see Fig.
Viscosity, however, does not give any indication of the lubricating properties of the oil. Since the areas of use of adjacent SAE classes overlap, minor temperature variations can be ignored. Mixing oils of different viscosity classes is allowed if you need to top up the oil and the outside air temperatures no longer correspond to the viscosity class of the oil in the engine.
Motor oil specification
In principle, only HD oils can be used in modern engines. HD oils are alloyed oils, the lubricating properties of which are significantly improved by adding various chemicals. These additives improve the anti-corrosion properties of the oil, improve its resistance to oxidation, in particular, these additives reduce foaming in the crankcase, improve the viscosity of the oil, improve the cleaning and dissolving properties of the oil. Cleaning and dissolving additives not only reduce the formation of sediment in the engine, they also have the ability to dissolve sediment, maintain them and all other contaminants in suspension, as a result of which all contaminants are removed from the engine during an oil change.
The quality of HD engine oil is classified using the API system (API - American Petroleum Institute). European manufacturers also follow this system.
The name of the oil contains two letters. The first letter indicates the area of use: S = service, suitable for internal combustion engines; C = Commercial, suitable for diesel engines.
The second letter indicates the quality in alphabetical order. The highest quality oils have the following API specifications: SG - for internal combustion engines and CF - for diesel engines.
Attention! Machine oils that are offered by manufacturers exclusively as oils for diesel engines cannot be used in internal combustion engines. There are oils that can be used both in internal combustion engines and in diesel engines. In such cases, both specifications are indicated on the container (e.g. SG/CD).
For Ford-Mondeo petrol engines, SG motor oils that meet the API specification are suitable, for diesel engines, CD oils (or CE/CF) that meet the API specification can be used. European oil suppliers additionally indicate the CCMC specification. CCMC specifications take into account, in particular, European engine production technologies and are becoming increasingly important. Depending on their quality, oils for petrol engines are assigned CCMC classes G1-G5; oils for diesel engines used in passenger cars are assigned CCMC classes PD1/PD2.
For diesel engines, Ford specifies the use of standard oil CCMC-PD2. This oil meets the API CD specification with additional European requirements.
Oil consumption
Oil consumption in internal combustion engines should be understood as the amount of oil consumed as a result of combustion processes. Oil losses resulting from leaks from the oil pan or from the cylinder head cover should in no case be considered oil consumption.
Normal oil consumption is caused by the combustion of small amounts of oil in the cylinders and by the release of combustion and wear products. In addition, the amount of oil is reduced by the high temperatures and pressures that prevail in the engine. The operating conditions of the vehicle, the driving style and manufacturing tolerances all affect oil consumption. In normal conditions, oil consumption is so small that very little, if any, oil needs to be added during the period between prescribed changes.
It is essential to add oil if its level has reached the "top up" mark.
Attention! Do not overfill the oil above the MAX mark. If too much oil is poured, the excess must be drained. Otherwise, the catalytic converter may be damaged, as unburned oil will enter the exhaust system.