Then why not use straight 30 weight in your automobiles? People use 10-40 in cars because the 10 weight component gets up into the pistons quicker to lubricate when starting your engine. Any type engine be it on a lawnmower or automobile.
.
You must work for the “Ad Council.”
I’ve run numerous vehicles beyond 350K miles on SAE 30 with no problem. I’ve also seen cars with less than 20K fail catastrophically on synthetic.
Rings do not need oil normally, and it is failure of the oil wiper rings that causes carbon contamination that jams the compression rings.
.