Top Five Car Engine Problems Explained

PROBLEM No. 3. MOTOR OIL CONTAMINATION

Question: How does motor oil contaminate? 

Reference of MITASU OIL expert: One of the main factors deteriorating oil in the process of its operation in the motor is its contamination. The contamination process occurs in the following directions:

– complex processes of chemical transformations of oil hydrocarbons (oxidative polymerization, etc.);

– contamination with fuel combustion end products;

– contamination with end products of additive agents activation;

– contamination with ends products of the engine wear and products entered to oil from the external environment. 

Impurities accumulated in the motor oil are of organic and inorganic origin. The following refers to organic contaminants: products of, incomplete fuel combustion; sooty and coking particles; end products of oil decomposition, oxidation and polymerization; asphaltenes; tars; oxyacids; polycarbons and carboids. Impurities of inorganic origin are represented in oil by end products of wear and corrosion; external contaminations; products of metal-containing additive agents' decomposition; different salts; cinder particles, water, etc. 

Question: What danger does oil constitute for the car motor? 

Reference of MITASU OIL expert: First of all, the motor oil leads to abrasive wear of the combustion engine (CE) parts, which occurs as a result of entering solid particles into the layer of liquid grease separating the friction surfaces, by which the contact of these particles with wearing surfaces is provided. The abrasive wear rate depends on the sizes of these particles, their commensurability with the gaps between the separate parts, as well as the form, hardness and mechanical strength of the contamination particles. Any mechanical impurities, which sizes exceed the borderline oil film thickness cause the discontinuity of the oil film and provide for contact with metal surfaces causing the increased wear of the combustion engine parts. 

Question: What is the main reason of oil contamination? 

Reference of MITASU OIL expert: It is generally acknowledged that 75–90% of contaminations are of organic origin, i.e. end products of incomplete fuel combustion. The primary sooty particles entering oil from the combustion chamber are 0.3 – 0.5 μm. In oil, theses particles form a disperse phase with a large reserve of free surface energy, which provides the particles' striving to aggregation (coarsening). The formed aggregates of sooty particles, coming to the area of high temperatures, strengthen considerably becoming abrasion-dangerous. At the same time the medium size of insoluble contamination particles, the engine parts' wear accelerates and deposits on the secondary oil filters grow. 

Question: Is it possible to solve the problem of oil contamination? 

Reference of MITASU OIL expert: Addition of dispersing-stabilizing additive agent to oil lets preventing from the process of contamination insoluble products aggregation and stabilize them in the low-dispersing state preventing from the engine part wear and blocking of the oil filters' pores.

The use of high-technology set of dispersing-stabilizing additive agents is a pledge of MITASU OIL CORPORATION motor oils quality.  

PROBLEM No 4. MOTOR OIL VISCOSITY 

Question: Is viscosity really one of the most important characteristics of the motor oil? 

Reference of MITASU OIL expert: The ability to provide liquid friction, hydrodynamic friction in bearings and, hence, their normal operation depends on oil viscosity. The oil viscosity has an impact on the wear of the crank shaft necks and bearing inserts, parts of the cylinder-piston group. In case of the optimal oil viscosity the reliable gap seal in the cylinder-piston group is provided.  

Question: How do all-season motor oils operate and how do they provide the constant set viscosity at any temperature? 

Reference of MITASU OIL expert: The viscosity decrease in operation in case of thickened (all-season) oils occurs as a result of mechanical, thermal or thermal-oxidative destruction of viscous polymer additive agents.

Question: What danger does the motor oil viscosity decrease constitute? 

Reference of MITASU OIL expert: The following are the results of operation with low-viscosity oil: melting of bearings, scuffing of the parts of the cylinder-piston group, breakdowns of the crank shaft. The high quality of thickening additive agents used by MITASU OIL CORPORATION, Japan, is a guarantee of your engine protection from the oil viscosity decrease during its operating life.