The terms synthetic. with oil.

Synthetic Oil
Lubricant base oil contains chemicals mixed with increasing the quality, divided into three major categories according to the type of fuel.
Base used to produce oil as Type 1 is the oil generally made from mineral oil is refined oil directly type 2 is a synthetic engine oil (Synthetic) produced from oil, which were printed to the special features than mineral oil. general, such as resistance to react with oxygen in the air. Age transformation and use longer. Low rates reduce evaporation and better than general engine oil. Use synthetic oil best. The decision is yours