I read a lot of oil threads over the years and most of it is very subjective and even the "factual" parts can be biased depending on the test and who was performing it. There's things that synth oil does better and things that dino oil does better so I use a blend of the two. However, unless you flat out use the wrong oil, any difference in protection/performance won't manifest for many years and miles - likely long after you've moved on so don't sweat the small stuff.