Experimental Comparison of the Effect of Using Synthetic, Semi-Synthetic, and Mineral Engine Oil on Gasoline Engine Parts Wear

Table 1

General overview of base oils and viscosities.

API group	Classification	SAE viscosity	Cost
Mineral base oils
Group I	Mineral oil	15W40, 20W50	Low
Group II	Mineral oil	10W40, 15W40	Low
Group III	Mineral oil/hydrocracked	5W20, 5W30, 5W40, 10W40	Moderate
Synthetic base oils
Group IV	Synthetic oil	0W20, 0W30, 0W40,; 5W20, 5W30, 5W40, 10W40	High
Group V	Synthetic ester	2W20, 0W30, 0W40	Extremely high