Thanks for your reply Star. I would think they would want people to know as much as possible to insure reliability of their engine.
They do not! All they care about is making a product that will have the fewest or at least a negligible number of warranty claims and will get past the warranty and not be too much worse or too much better than the competition.
Gone, are the days of people making a product with every intention and even hoping you can get a decade or even two decades plus of service from it with minimal repairs and maintenance.
Now to address the actual post, that's great if you want to know what the oil pressure is but it's just a waste of time to get the gauge out and put it on the machine..
It obviously has oil pressure and it's doing just fine or it would have blown up several hours ago.
It doesn't really matter much about the oil pressure either because we had lawn mower engines for decades that had no pressure lubrication and work just fine but I'm not saying these would continue to run long without the oil pump because they've designed them that way and they've become more fragile in that aspect without actually giving us any more years of longevity. Lol
But overall, with engines in general, they need very little oil pressure too live a long and mostly happy life.
Almost everything out there has far more than it needs and you can see from the specifications for the oil pressure lights etc on most of these vehicles and mowers that is typically in the three to four PSI range and even cars as low as four to six before the lights come on that it doesn't take much.
It is also not accurate to say that if one only needs 5 PSI that 10 is going to be better and that 20 is going to be even better.
Having a little bit of a cushion like 7 to 9 would be just fine and 10 would probably be fine in these situations also but there is a point of diminishing returns or the lack of any extra returns where it's just a waste having 25 psi let's say because it's not going to help the overall durability of the engine in any way whatsoever.