What oil is better: synthetic or semi-synthetic?
Most modern motors are designed for the use of synthetic oils. Moreover, it is strictly contraindicated for a motor prone to leakage, because the liquid state of the lubricant can enhance it, especially in older motor mechanisms. Semi-synthetic and mineral oils are recommended for used vehicles, which were developed for such oils. In addition, to save money, many experts propose to use semi-synthetic oil as it costs less. There is also a “golden mean”: these are semi-synthetic oils made by mixing the mineral oil with the synthetic one. At the same time, they have the same characteristics as chemical oils, but are more affordable. Semi-synthetic oils have an increased penetrating ability and excellent thermal stability. Such oils reduce stickiness and viscosity of moving metal parts at cold start of the motor.