haven't seen ??????????????
any truly large -- small engine repair shops using syntitetic oils
talking very large shops that order oil by the many 55 gallons
I still visit the old City shop where I worked for years
they have some ((master mechanics)) working there -- some 40+ yrs exper
still using what we call -- the old -- common oil
ridden a many a 2-wheel thing with it
Because it's cheaper to buy. Bottom line. But to say "That the REGULAR (oil) stays on the internal parts better at the highest temperature." is not true. Use whatever oil makes your thing lubed and going, but keep the lube thing factual.