Some folks simply cannot afford the better tires due to co$t .
I was in that boat for decades and hated it .
Some here will falsely claim there's no benefit, maybe they're broke, maybe they're ignorant, don't beat up on them until you know what for sure .
I use synthetic multi viscosity oils in all my engines, even the old worn out and worthless ones because fully synthetic oils stop the wear cycle pretty much dead wherever it is ~ I have one old Honda 90CC Motocycle with well over 40,000 miles, it neither smokes now knocks but it's clatters a
LOT 
.
Oil is the very cheapest Mechanic you can get .