I am new here, but gonna add my .02. You do in fact run a weedeater engine, but that is beside the point. Just because you do not agree does not make it bullshit advice.

I can assure you, manufactures play it safe with their recommendations.
sigh,,I am older. I have seen a bunch of 2 smokers in my time. We used to mix everything at 15:1 and 20:1. That was many years ago. As the oil and tolerances got better, the mixtures changed.
I was taught that you mix the oil according to the oils technology. I still own and use a chainsaw that states 20:1 on the lid. I mix it at 50:1 with stihl chainsaw oil. By all of you guys theory's, I should follow the chainsaw gas cap directions, and not the oils directions. You would be wrong.
It may be
safer on the motor to run the 25:1 as suggested by the manufactures, but not the only way to successfully run the engine, and possibly not the best way to get "all you can get" from the engine.
If the manufactures opinion was really that important to you,,,you would not put any aftermarket parts on your car,,as they do not recommend that,,,,,
so any facts for either side or is it just a immature pissing contest?