I'm not trying to start a debate,nor am I looking for one,just stating what's in my 2 cars....
First car is a dedicated road race 65 Mustang,331 cu in.,alum. heads,13.5 to 1 compression, shift at 6500rpms, 7000 chip in the MSD box which I hit on almost every track..just shy of 500hp..I've run
oil temps of up to 270 depending on the track and outside air temp......While I "use" the engine for it's intended purpose, I have at times abused it,but not on a regular basis....
With all that said and done, my rotating assy. is/was an Eagle 4340 forged unit...4340 forged crank,chevy journals,4340 forged H-beam 5.4 rods...solid roller camshaft,forged Diamond dome pistons....it ran 7 long hard seasons with only regular
oil changes,probably as many miles as you'll put on you'lls car......
It did break, 100% my fault when I screwed up on re-assembly after 7 years.....all it required at the time was a light hone in the cylinders and new rings/bearings, that's it......I replaced the rotating assy. with another, the exact same one I had in there before.......
I saved the crank and 6 rods and they were re-used in another 331, street engine making about 425 hp....this is a street car engine (car #2,65 Fastback) that doesn't go past 6000 rpms.........so far,so good......
David