When I build an engine, there are several things I do to assure longevity.
1. I install an asswipe oil filter. These can be had brand new from Frantz or from Amsoil, and the price isn't horrible. I buy them used on eBay for < $100. Sometimes about half that. I have three permanently installed, one on my boat (454 Chevy), one on my work truck (350 Chevy) and one on my solvent tank. I have another that I use as a "temporary" on fresh engines, then it gets removed after a thousand miles or so. Installation consists of adding a brass tee to the oil pressure sending unit, or some other source of pressurized oil, a return fitting typically in the oil pan, but anywhere into the valve cover or crankcase area can work, a couple of hoses, and a location to install the filter bracket and filter canister.
These bypass filters will maintain clean "as new" oil. Any break-in wear particles are trapped in the bypass filter even if they are too fine to be captured in the full-flow filter.
2. I don't use RTV silicone as a gasket dressing, except where two gaskets or a gasket and a seal come together. RTV silicone can be used INSTEAD of a gasket, but not as a gasket sealer. There's a dozen products that can be used as a gasket sealer/gasket dressing, RTV is not one of them. And I never, ever use RTV silicone on ANYTHING related to the oiling system.
3. If the cylinders are properly prepared, the rings are practically seated by the time the engine has cranked over enough to start and run. However, just to be sure--and because it's entertaining--I will run the engine at 1800--2200 rpm on a test stand (I don't have a dyno) long enough to break in a flat-tappet camshaft (20 minutes, ten minutes, shut down and cool, then another ten minutes.) which also allows for verifying no leaks and no surprises. Once in the car, with timing set and whatever other adjustments that are needed, completed, take the vehicle 30 miles "out of town" on a deserted highway, put the thing in high gear, and STAB THE THROTTLE from ~30 mph to ~70 mph. The concept is to get high cylinder pressure, but only MODERATE RPM. Therefore, the actual speeds are dependent on gearing and tire size. Once you're at about 2/3 of engine redline, let off the throttle and coast back down to the bottom of the high-gear power band. With the throttle closed, you generate a lot of vacuum, which tends to bring oil up the cylinder walls to the rings which washes away any wear particles. Then stab the throttle again, gain speed, coast , stab, coast, stab, coast until it stops being fun. Of course you're watching the temp gauge, the oil pressure gauge, listening for detonation, etc. And if the car is an automatic, either disable the kickdown, or accelerate as hard as the vehicle will go WITHOUT dropping down to a lower gear. Again, you want high cylinder pressure alternating with high vacuum, but not high RPM.
This is almost the opposite of the Toyota recommendation listed previously. Run that engine HARD, not gently during the ring-seating part of "break in". After that, do what you want. (It doesn't matter once the rings are seated.)
4. IF (Big IF) you use heavy moly-based grease as an assembly lube on flat-tappet cam lobes and lifters, keep in mind that the heavy Moly paste can plug an oil filter in about 20 minutes. I change the full-flow filter, and the bypass filter element if it's no longer getting hot. I don't change the oil, because the bypass filter is keeping the oil totally clean. Therefore, I don't cry over dumping expensive, specialized oil three times during break-in, because I DON'T dump the oil three times, I just change filter elements--and the filter element for the Frantz bypass filter is a roll of toilet paper..