Thanks for that information. But I don't think so. There is a Honda dealer that sells ATVs and generators and other stuff. So I am going to check there. I went there a long time ago because my Toro lawnmower had a Honda engine. But they said they did not do anything with lawnmowers. But it seems like they should have Honda oil, especially since the Honda oil that came with the mower is actually SN and not SJ. At least they should have Honda oil if the ATVs and Honda generators they sell are using Honda oil.
If they do have Honda SN oil (probably in quart bottles) I could get that and just get something to put it in to measure out 12 oz. I can't use the 12 oz. bottle because it does not have markings and is not translucent on one side.
Otherwise, if they make it impossible to get Honda oil and especially since SN oil is being used anyway, I will probably just use Mobil 1 or Pennzoil Platinum oil. No use making it too difficult.
I am going to order the kit that comes with oil, an air filter, and a spark plug because I can use that stuff next year. And I will order a new blade. The blades are not that expensive and not really much more expensive than just getting the blade sharpened. So I figure I might as well just put a new blade on each year but keep the old blades to be safe. They could always be sharpened.
The UPS guy who delivered the mower said he was getting his lawn tractor ready and he said it had taken him two weeks to get his blade sharpened at the local shop. I figure I might as well do my own basic maintenance and just install new blades. I can do that. Or else get some stuff so I can sharpen the blades myself.