What is the Difference Between Semi-Synthetic and Full-Synthetic Engine Oil?

[AniyahLee]

Semi-synthetic and full-synthetic engine oils differ in the following aspects: 1. Base oil composition: Semi-synthetic oil uses Group III base oil, while full-synthetic oil is a blend of Group III, IV, and V base oils. 2. Vehicle compatibility: Semi-synthetic oil is typically used for economical, small-displacement vehicles with smooth driving conditions, whereas full-synthetic oil is designed for harsh and demanding operating conditions. The procedure for adding engine oil is as follows: 1. Lift the vehicle, remove the underbody shield, and place a container with approximately 10-liter capacity beneath the drain plug. 2. Unscrew the drain plug, use an air gun to blow into the oil filler opening for two minutes, then tighten the drain plug and wipe it clean with a tissue to check for leaks. 3. Reinstall the underbody shield, lower the vehicle, and use a funnel to add oil through the filler opening.