Not all motor oil is the same.
Conventional motor oil = GOOD...cheap, light duty, must change out often.
Semi Synthetic Motor Oil = BETTER...combination of Conventional and Synthetic oil.
Full Synthetic Motor Oil = BEST...100% engineered for the heaviest duty, can last twice as long as conventional oil and withstand more heat, cold, and stress. Costs 2x-4x the price of conventional motor oil.
eNGines-OIL Full Synthetic Motor Oil = BEST OF THE BEST...engineered for industrial applications that far exceed automotive requirements, and cheaper than any other full synthetic oil in the market. The best and the cheapest!