10 weight oil implies low viscosity, and the Einsteinian model shows that viscosity is proportional to molecular size. So, in a sense he is right that the molecules are smaller. But, for optimum lubrication the molecules need to be of a certain configuration and they need to be large enough to be displaced only slowly.
the time? I had no answer. He said that since the 1950's he has run only pure 10 weight oil in every car he's ever owned. He said that once in the late '50's there was a recall, he took the car in and the mechanics were astonished by how perfect the interior of his engine was.
thus allowing more of them to get to bearing surfaces, etc. and providing better lubrication overall.
viscosity is proportional
smaller. But, for optimum lubrication
enough to be displaced
I may have been absent that day in Chem (it's only been since
1963-64), but I thought that the molecules were the same size for a given chemical, with the difference being either the spacing between molecules as with the difference between ice and boiling water, or the numbers or protons/neutrons encircling the atom as with the difference between regular water (that's kitchen , not bathroom) and heavy water.
Maybe the consistency of the oil increases as the wear on the engine does so leaks don't get any worse? :) Nevertheless, anyone advocating it is a cheap loser.
And I know people that still are chemists and engineers for oil companies and the companies that make addatives and they tend to disagree. If you still were in said industry you would know that since all the major oil companies have some form of synthetic on their line up it's okay to admit the truth. But not too okay because if EVERYone went to 20K mile plus change intervals, well, SOMEONE is gonna miss a Lamborghini payment, and we just can't have that.
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