Personally used Mobil 1 in the winter months for years in one vehicle for easy starting. Switched back in the spring.

It may lubicate better, I will leave that to the experts; however got over 500K miles on shop truck on conventional oil before retiring for rusted out body (ain't salt on the roads grand?). Cylinder head had never been off the engine, and engine was still in excellent shape. Did not burn any oil between changes. Key IS to change the oil AND filter.

Jon.