What is the shelf life of fully synthetic oil in the engine?

[Jimmy]

Fully synthetic oil has a shelf life of 10,000 kilometers or 1 year in the engine. Strictly speaking, fully synthetic oil refers to high-quality oil products that are 100% made from PAO or artificially synthesized esters, usually labeled with the word "synthetic" on the oil container. However, in simpler terms, oils blended with Group IV and Group V base oils without the addition of mineral oil can be referred to as fully synthetic oil. Fully synthetic oil is suitable for the following types of vehicles: 1. Vehicles with engine turbocharging technology: When the turbocharging component starts working, the engine torque increases exponentially. At this time, the oil film covering the engine crankshaft has to withstand several times more shear force than before, and high-quality fully synthetic oil can fully meet the requirements of the oil film. 2. SUVs and large-displacement cars: The common feature of these vehicles is that their weight is much greater than that of ordinary small cars, and the engine output power is very high, resulting in higher working temperatures for both the engine and the oil.