lol. I know little and less the more I know.To summarise:
If they knew a little of the little I know, then they'd know a little. But then little do they know, how little they'd know of the little I know.
We are but dwarfs standing on the shoulders of giants.Honda knows a little bit... smart fellas those Japanese Engineers.
No doubt they are great at what they do, but one should ask in what field are they proficient? We all know they are wonderful mechanical engineers, but are they also chemical engineers? What was the design life of the motor? 200,000 miles? That's in the ball park of how long I'd like it to last.
My point is that engineers don't and can't know every detail of everything they design. The oil in the manual is acceptable for their purposes which for all we know is to make it out of the warranty period.