Yaris 2007, 1KR-FE valves knocking

[Put-in]

After cleaning fuel injectors in ultrasound bath I experience valve knocking in interval 2000-2500 revs when it's slight uphill. I assume that car don't have enough fuel in that moment bcs when I add gas knocking stops.
knocking is more noticeable when engine is hot.
So, just after fuel injectors are cleaned that knocking started, with same fuel before it was not a problem. Now is 95 octane fuel, and still knocks.
It's really annoying, can someone help please?

[Bluevitz-rs]

One can only guess that your injectors are now clogged and not delivering enough fuel causing a lean condition and thus the knocking you're hearing.

[Put-in]

I have solved a problem. The problem was in wrong oil. It was 10W40, instead 5W30. I just have changed oil and all sounds have disappear :)