Oil breakdown

[Kas]

When I put this engine in my Hachi, engine was not running for 2 years.
First, I change to mineral oil, and drowe with mineral for about 1000 km.
Then I swiched to semisintetic Shell.

In first period, I didn't force to much, 5-5500 was the limit with hot engine.

Engine has no leaking at all, everything look's normal.

I know that when swiched to semisintetic or fuul sintetic engin can start eatig oil, BUT, can minerail oil be good for engine which rews to 7-8000 rmp?
I know that engine is old design, but, I also know that engine is very strong and she need a good lubricant.

I think if I use mineral oil, my bearings will break like shit.

In first time, Zax use 0W40 oil, than he change to semisintetic, 10W40.
As you all know, his bearings are broken. Yes, he drive like maniac, reving sometimes above 8000, near about 8500 what is a WAY to much for semisintetic 10W40 oil.

THIS is my opinion, and I will try now with full sintetic 5W40 Mobil.