Engine Oil ( Motor Oil )

Engine Oil ( Motor Oil)

Engine Oil is an important part of the trading and training of Naft Andish Yekta PTE JS Company.
The company started importing one of the Fully Synthetic based motor oil brands from Japan in 2015 through Singapore.

The customers of this oil were reputable companies of Iran Benz( setareh iran co.), Toyota ( irtoya), reputable and large repair shops in Tehran and provincial centers, and the brand was viewed on the main site of German Benz standards and had approval certificates of MB229.5, MB2295.1, MB229.3, etc.

* Engine oil is made on the basis of 2 big types ( 5 groups) of base oil :

Mineral base oil - Synthetic base oil

*Mineral engine oils are from the bases of API groups 1, 2 & 3, and synthetic oils are from the bases of API group4 (PAO s) & group 5 (ESTER s ).

API : American Petroleum Institute - API is a big global standard organization.

-In its first 100 years, API has developed more than 7000 standards to enhance operational safety, environmental protection and sustainability across the industry .

* The advantages of groups 4and 5 (Fully Synthetic groups) compared to oil engine oils are many, including: long consumption life, high oxidation resistance, reduction of car engine fuel consumption, environmental compatibility, no corrosion, no friction, low SAPS ...

Disadvantages: They are expensive and not produced in many countries.

Important Note : semi synthetic motor oils are only blend of two base : ( %X mineral base oil groups 2 or 3 + %Y synthetic base oil groups 4 or 5 ) , and means depend on process & formulations of companies . semi-synthetic is not API base oil group .It is only for the purpose of market sales by companies.

Engine Oil Yekta Group, since 2015, has been importing 4th and 5th generation car lubricants under the TOTACHI brand as an exclusive representative from Japan and through Singapore.

Due to the valuable experiences of the founder of the company regarding car lubricants and his reputation in the oil industry, the above brand was introduced and recognized in the market very quickly and the star companies of Setareh Iran (Iran Mercedes Benz), Iran Toyota (IRTOYA) and many Ramak khodro dealerships The car (Ramakkhodro) became a regular customer of the company.

* Activity in this case: Imports from Japan, Singapore, Austria and in the coming months will open a factory for the production of automotive lubricants based on Fully Synthetic.

At API performance level of engines, S means is spark system( gasolines) engines & C means is commercial and passenger cars diesel engines.The last & new API service to gasoline engine cars is API SQ ( 2025) .SQ Current Introduced in March 2025, designed to provide protection against both fresh and aged oil low-speed pre-ignition (LSPI),
improved timing chain wear protection, improved high temperature deposit protection for pistons and turbochargers,sludge and varnish control. API SQ with Resource Conserving matches ILSAC GF-7A by combining API SQ performance with improved fuel economy, enhanced emission control system protection, enhanced low temperature pump ability and protection of engines operating on ethanol-containing fuels up to E85.

API S : ( Service class , for GASOLINE engine cars)

As you can see in the tables and diagrams above engine oil is completely affected by its viscosity factor against engine temperature and geographical environment.

Therefore, in purchasing and using any type of engine oil, it is necessary to pay attention to the geographical conditions and type of technology of the year of manufacture of the car engine, as well as the number of cylinders and the type of mineral or synthetic base oil so that your car repair costs do not increase.

There are cars that have old technology but are still being produced and we need to pay attention to their engine type and degree of viscosity.

API C : ( Commercial class for DIESEL Engine cars ) :

The current and previous API Service Categories are summarized in convenient charts. Vehicle owners should refer to their owner's manuals before consulting these charts. Oils may have more than one performance level.

For automotive gasoline engines, the latest engine oil service category includes the performance properties of each earlier category. If an automotive owner's manual calls for an API SN oil, an API SP oil will provide full protection. For diesel engines, the latest category usually - but not always - includes the performance properties of an earlier category.

API’s Engine Oil Licensing and Certification System (EOLCS) is a voluntary licensing and certification program that authorizes engine oil marketers that meet specified requirements to use the API Engine Oil Quality Marks. Launched in 1993, API’s Engine Oil Program is a cooperative effort between the oil and additive industries and vehicle and engine manufacturers Ford, General Motors, and Fiat Chrysler and those represented by the Japan Automobile Manufacturers Association and the Truck and Engine Manufacturers Association. The performance requirements and test methods are established by vehicle and engine manufacturers and technical societies and trade associations such as (ASTM), (SAE), and the American Chemistry Council (ACC).

SAE : Society of Automotive Engineers ( American) -This society is responsible for establishing a classification system based solely on oil viscosity.Organization SAE works for the quality of motor oils of automotive and industrial lubricants while monitoring the quality of production based on the viscosity. Writing and displaying this standard on the containers of all lubricants is mandatory.

SAE's charitable arm is the SAE Foundation, which supports many programs, including A World In Motion® and the Collegiate Design Series.

Founded in 1905, SAE strives to serve its primary constituents in a variety of ways. Through its globally-recognized magazines, Automotive Engineering International, Aerospace Engineering, and Off Highway Engineering, SAE informs the mobility community about the latest developments in the field.

SAE's broad array of technical, historical, and statistical publications are distributed to customers in more than 65 countries annually. SAE's Training and Professional Development capabilities have been expanded in the past 20 years - SAE now produces more than 450 separate professional development events every year.

xx W is SAE viscosity grade The start time of the car is in the cold of the engine & yy is SAE viscosity grade at car driving

ISO-International Organization for Standardization

ISO is a big global & international organization to all industry sections.ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees.

Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.

International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

MIL-L engine oil quality level standard:

The word MIL-L stands for MILitary Lubricant, motor oil and lubricants related to military applications. Some of the quality levels of this standard are MIL-L46152A, MIL2104D, MIL-L2104A, B, MIL-L2104C, MIL-L45199B, and MIL-L46114. , 5. Of course, there are many other classifications for the quality level of engine oil that are not general. Such as the classification of Volkswagen (VW), MAN (MAN), Mercedes-Benz and Mack.

In most of the countries and the dear country of Iran, among the above classifications, the most common API is the standard of the quality level of engine oil. Therefore, in detail, the quality level standard of engine oil is described in the section.

ILSAC : International Lubricants Standardization and Approval Committee

The ILSAC standards, denoted by the terminology ILSAC GF-x, are based upon the API service categories and bring additional performance requirements, for example fuel economy improvement, and restrictions in the viscosity grades that may claim to meet an ILSAC standard.

On March 31, 2025, GF-7 officially became the leading ILSAC performance level, and API SQ became the corresponding alphabet inside the API donut on the product label. There was relatively minor marketing promotion from major brands. The biggest issue for many may have been using up and changing labels on bottles. It should be noted that the ILSAC Starburst and Shield are evergreen symbols, and for the next year the symbols can represent both API SP and SQ.

Founded in 1992, the International Lubricant Standardization and Approval Committee (ILSAC) is an organization through which Ford, General Motors, Chrysler and the Japan Automobile Manufacturers Association, Inc. (JAMA) develop minimum performance standards for passenger car engine oils used in gasoline fuelled engines.

ILSAC utilizes the API’s Engine Oil Licensing and Certification System (EOLCS). This is a voluntary licensing and certification program that authorizes engine oil marketers who meet specified requirements to use the API Engine Oil Quality Marks. These emblems go directly on each container of oil that retains the certification for and is there to help consumers identify a engine oils for their gasoline-powered vehicles. Only oils meeting the latest ILSAC standard may use the API Certification Mark. New ilsac oil standard grade is ILSAC GF-7 ( 2025) : Introduced in March 2025, designed to provide protection against both fresh and aged oil low-speed pre-ignition (LSPI), improved timing chain wear protection, improved high temperature deposit protection for pistons and turbochargers, sludge and varnish control, improved fuel economy, enhanced emission control system protection, enhanced low temperature pumpability and protection of engines operating on ethanol-containing fuels up to E85.

As you can see, the thin film of full synthetic engine oil has better protection than mineral engine oil due to the uniformity of the molecules that make up the oil.

The engine has always been the ultimate platform for identifying the required quality of its oil. Even as engine design has changed to meet performance, fuel efficiency and environmental standards, the engine continues to be the ultimate arbiter of oil quality.

However, using the engine to measure oil quality in dynamometer tests can be an expensive proposition. Even so, to help control warranty costs, the development and use of engine tests is unavoidable for engine manufacturers when determining the oil quality needed for a particular design or component.

Although necessary, generating repeatable dynamometer tests for an engine can be challenging. As engine design has progressively increased power from smaller engines, the difficulty of establishing repeatable dynamometer tests has grown even more rapidly. Fortunately, once the quality level has been determined on the dynamometer or in the field, there is a much less expensive approach that can be applied to more precisely appraise the oil quality.

Engine oil is for a car, what blood is for a human being. It won’t be wrong to say that any vehicle can’t survive without engine oil. It serves as a protection for car components against wear and tear even when temperatures inside the motor go in access of 120 degrees.

Hence, choosing the wrong grade of engine oil for a car or opting for an inferior quality one can have very bad results. To serve the engine, oil must possess certain physical and chemical properties.

During the oil’s service, the engine generates a number of operating stresses that adversely affect the long-term ability of the oil to function at a consistently high level. Service conditions may also vary widely depending on the environment and the way the vehicle is used.

Consequently, choosing an engine oil to meet particular service needs and conditions requires knowledge of several important oil properties, including viscosity.

This is because wrong fluids lead to increased friction between the movings parts of the engine, which in turn causes accelerated wear and tear. Also, using the wrong viscosity of engine oil can lead to a huge drop in the performance of the car. Also, in case of an oil leak, the engine is sure to seize, which will lead to an expenditure of lakhs in repairs. Therefore, it’s really important to know how to choose the best engine oil for a car.

NOTE : Brief information was provided about engine oil for better understanding. If you have any questions, do so by email or Q&A. Our experts will be on duty 24 hours a day, 7 days a week. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------