Clorinated solvents as used in gear oil will increase load bearing abilities but at a cost -- wear. Fuller truck transmissions forbid the use of chlorinated oil in their transmissions and auxiliaries.
A friend who had a machine shop sneered at the lubrication engineer's salesman who I invited to give a demonstration of Almagard 3752 chassis lube. A "knowing" evil eye. He was fully prepared to embarrass the salesman (and me)
He had a lathe with a 48" swing and 26' bed. A monster powered with a ten horsepower hydraulic motor.
He disassembled the live center. Smeared the grease onto the contact points. Started the lathe on a speed of about 60 RPM then used the wheel on the live center to jam the center point into a round plug of about 18" in diameter.
His eyebrows rose. I smirked. Harder and harder he jammed the live center into the plug (which had had a pilot depression started in it).
He ended up jamming the point in as hard as he could twist the wheel. The live center point kept revolving in the disc. Smoke curled out. Expressions of amazement were made.
In the end, he placed a multi-thousand dollar order for LE products. Today he is retired. But he is as sanctimonious as a converted whoppee lady about the product.
Superior products do exist. But as a chemistry minor, I agree with the experts that a superior ani-friction product has to be engineered from the ground up starting with the base oil.
I keep meticulous records of fuel mileage. When a course has been repeated a few dozen times, then a significant change in fuel economy is noted, I pay attention. Via arm-twisting I tried the major Teflon oil additive. It had no discernible effect -- not even to the tenth of a gallon on repeated 155 mile round trips. I have to agree however -- it was Slick enough to get into my shorts.
Lubrication Engineers claimed their Amasol 607 gear oil would slow leaks at shaft entry points. It has done exactly that with several of my differentials and transmissions. From a quarter-size drop of oil on the concrete nightly to no drip at all in 2-weeks. I appreciate companies whose advertisements live up to the hype.
Other notable examples I have found are molybdenum filled versus chromium piston rings (good and bad points for each type).
But a claim that engineers devote time to taking a good product and purposely devote their skill to making it failure prone, is hard to swallow. It's usually a case of peer pressure design flaw by fiefdom or a lost war with the bean counters.