Re: Oil tested after 10 years use.

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Posted by TheOldHokie on December 12, 2018 at 07:25:45 [URL] [DELETE] :

In Reply to: Re: Oil tested after 10 years use. posted by Tony C on December 11, 2018 at 20:12:59:

Quit changing the topic. We are not talking about OCI or the benfits of used oil anlaysis in choosing a drain interval. We are talking about the myth previously stated here that "engine oil never wears out" which is patently false.

Used engine oil can be reclaimed but the process is not as simple as particulate filtering whether by centrifuge or media and additive replenishment. It is accomplished by using the waste oil as feed stock for a refining process very much like the processes used to produce base lube oil from crude or synthetic feed stocks. As I said earlier this process yields roughly 60% by volume of newly refined base oil from the waste oil feed stocks.


Used motor oil re-refining

See also: Motor oil: Re-refined motor oil

Used oil re-refining is the process of restoring used oil to new oil by removing chemical impurities, heavy metals and dirt.[2] Used industrial and automotive oil is recycled at re-refineries. The used oil is first tested to determine suitability for re-refining, after which it is dehydrated and the water distillate is treated before being released into the environment. Dehydrating also removes the residual light fuel that can be used to power the refinery, and additionally captures ethylene glycol for re-use in recycled antifreeze.

Next, industrial fuel is separated out of the used oil then vacuum distillation removes the lube cut (that is, the fraction suitable for reuse as lubricating oil) leaving a heavy oil that contains the used oil's additives and other by-products such as asphalt extender. The lube cut next undergoes hydro treating, or catalytic hydrogenation to remove residual polymers and other chemical compounds, and saturate carbon chains with hydrogen for greater stability.

Final oil separation, or fractionating, separates the oil into three different oil grades: Light viscosity lubricants suitable for general lubricant applications, low viscosity lubricants for automotive and industrial applications, and high viscosity lubricants for heavy-duty applications. The oil that is produced in this step is referred to as re-refined base oil (RRBL).

The final step is blending additives into these three grades of oil products to produce final products with the right detergent and anti-friction qualities. Then each product is tested again for quality and purity before being released for sale to the public.[6][7][8]

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