I did make a mistake in my interpretation of the testing. Synthetic will extend engine life, but regular oil changes with Dyno will allow an engine to remain within tolerances to the 250k to 300k. At this mileage, wear is measurable but not engine life threatening. With a synthetic, it will be better. So, if you plan to drive your vehicle to 500k miles or that range, that would be a good reason to use synthetic. Sorry for the misinfo.
