Various industry standard comparison tests were performed on some popular brands of synthetic oils vs some popular brands of mineral oils.
A series of comparison tests were conducted on various mineral oils and various synthetic oils to determine if the higher cost was worth it. The results of the tests confirmed that synthetic oils are worth the extra cost. Some of the tests even showed the superiority of Amsoil synthetic oils when compared to other brands of synthetic oils as well as mineral oils. The industry is just now catching up with what Amsoil has claimed and stood behind for over 45 years.
The cost analysis was done with in-depth testing on 5 synthetic oils and 5 mineral oils by AAA, to see the official report click on the link below.