What is an automobile oil tolerance and why is it needed?

An automobile oil approval is a certificate of conformity issued by an automaker or an international organization (such as API or ACEA) that confirms that a given engine oil has passed all the necessary tests and meets the strict requirements for lubricants for specific engine models.

Automakers develop their own tolerances based on design features, materials, engine systems (for example, exhaust toxicity reduction systems, turbocharging, direct injection systems), as well as recommendations for replacement intervals.

The main purpose of the tolerances is to ensure that the oil used will provide optimal engine wear protection, efficient cooling, clean internal parts, proper operation of exhaust gas neutralization systems, and maintain specified replacement intervals.

The use of oil with the appropriate tolerance is the key to the durability of the engine, its stable operation and compliance with environmental standards.