oil question on fairly new engine build

i say i've had good luck with synthetic because this car is replacing the 268,000 mile (original drivetrain) mustang that my dumb butt traded off. Three mark viii's as well all with over 200k got the synthetic treatment too. had a water pump go out on one of the m8s and it heated up to the point of shutting off and wouldn't crank back until the next morning. Fired it up, no knocks, no smoke, replaced the wp and went another 40k or so before trading the car. Yeah i'm a believer! lol