Unless they replace worn metal in the rings and cylinder walls, no oil is going to help.
On some engines that are either not driven much or sat with old oil in them for a long time it is possible that the rings could become gunked up or stuck. Usually a high detergent oil and some hard driving will clean it out, or an additive such as "seafoam" or Marvel Mystery oil.
You could try a thicker oil like a 20w-50 or 15w-50, that may do something.