Is it labeled as API "SN" grade? Does it meet the minimum requirements for the vehicle you are putting it in? For example: GM 4718M, which some Corvettes required. If so, go ahead and use it and don't worry about it.
I believe synthetics are head and shoulders above dino oil in terms of protection so that's what I choose to use in every item I own that has a gasoline-powered engine. I currently use Pennzoil Platinum in the appropriate weight rating in all my vehicles.
Practically speaking, very few of us keep a vehicle for enough years or put enough miles on a vehicle for the oil used to make a significant difference, as long as regular maintenance is performed.