Tangent: the filter
The thing about oil filters is this: the bypass valve must pop-off at the correct psi. In other words, if you have a filter that gets plugged, the bypass valve (if it even has one-depends on the brand and construction), must allow straight thru flow in the event the filtering media gets too clogged to allow sufficient flow.
Different filters have different pop-off rates, and different dimensions of surface area and thickness of media. The quality of construction also varies, as well as the reliability of the bypass valve to pop off at the correct rate.
Bottom line, don't experiment with filters.
Personally, I ONLY use Mobile-1 M110, or the OEM filter from Honda.
If I had the inclination to research other filters for their specs, maybe there are other cheaper filters to get the job done. But what if I chose a cheap filter that, say, has sloppy tolerances for the bypass pressure valve? I would never know it, and the oil wouldn't be getting filtered and cleaned properly. Or maybe the filtering media area is small or loose, allowing too much dirt or other contaminates through? While enjoying the bliss of saving a few bucks on a filter, the engine is paying a small but steady price.
As far as what engine oil is the best- I think the expensive name brands (Amsoil, Honda HP4S, Repsol, Mobil-1 4T, Castrol, etc.) have their advantages, and better protection in hard to extreme use. But ultimately, the best oil is most any engine oil that's clean and within OEM spec.
Most of this is my opinion after reading the last hundred or so oil threads, and many good websites explaining everything lubrication.
Anyone have differing opinions?