I have a lot of problems with this vid.,( I will admit I rushed through it) They never measured a thing?
Was it a direct injection? or regular?
What I do know is, with over 200K on our direct injection Honda turbo civic , we have not had to take it apart for intake valve cleaning which has been a HUGE issue for all direct engines.
Direct injection engines accumulate a huge build-up on the back side of the valves, making them run terribly.
So far so good.
I use 100% synthetic oil
afaik.