break in period on cars, yes. but that doesnt mean you cant use it. same should go for these ovens. not being able to use them because of contaminants after 1-2 cycles is absurd. these things are dang near the price of small cars!Definitely need a break in period. Id run a long cycle every night on a new oven for at least a couple weeks before Id use it.
New car? Absolutely needs a break in period. When you buy one, it typically has a break in oil in it. The parts need to machine themselves for the best fit and long term performance. That's why you never, ever put a synthetic super slick oil in a new motor. Its too slippery and wont allow a proper break in. The dealer usually wont tell you, but you should know to keep the RPMs low for the first coupe thousand miles and vary your speed a lot.
After a couple oil changes, if broke in properly, it will run better and you will have more power than an identical car that was just drove with no concern for the break in period and it will last much longer.
for the record, i never had an issue with my sintering furnace and i ran just one single long sinter program on it. once. when it first arrived. its worked like it should every time since then.