Thanks Corey. That explanation sounds convincing- until you start to wonder
how engines manage 200,000 miles without a flushing, or what that backward
pressure will do to things like oil screens that weren't designed in that
direction, or what damage can particulates too small to be captured by the
filter really do, or how byproducts of combustion gets from the top of the
pistons to the oil pan.
----- Original Message -----
Cc: <firstname.lastname@example.org>; <email@example.com>
Sent: Monday, May 06, 2002 7:29 AM
Subject: Re: Engine flushing - off topic, a bit.
> The very same incident happened to me just yesterday!
> I stopped by for a "quick oil change" and they displayed the blacken oil
> from my 1999 Passat as though it was a cancerous tumor. "You should flush
> the engine immediately"... for only $59.95. When I asked what does it do,
> how could it clean the engine without destroying the seals or affecting
> the lubrication... they pointed to a chart (I guess they didn't know, just
> sell the service - that builds my confidence!).
> I figure I could get three oil changes for the price of one engine flush.
> I call a friend, who suggested I run, run fast!
> I did find this explanation from http://www.autoprofit.com/demo.html
> appropriately named "Automotive Profit Centers. Their FAQ and media demo
> How does the machine work?
> After the oil is drained, adapters connect the machine to the car through
> the filter housing and the drain plug port. A heated detergent solution is
> then pumped under 42 pounds of pulsating pressure through the oil
> reservoir, passages, oil pump, and up into the valve train. It back
> flushes the oil pump and pickup screen of the engine. The solution breaks
> up and dissolves sludge throughout the engine and is then vacuum extracted
> out of the engine, removing the sludge and debris. The oil lubricating
> system of the engine is now clean and can function as originally designed.
> This process takes approximately 10 minutes
> If you change the oil regularly, why do you need the service?
> Through its normal operation, an engine accumulates abrasive particulates
> that increase internal engine friction and wear. The oil filter is there
> to remove these particulates, but with 30w oil used in the engine, the
> filter is unable to filter fine enough to remove all of these impurities.
> The longer a customer goes between oil changes, the less effective the oil
> filter becomes. The result of these particulates, along with other
> byproducts of gasoline combustion, is sludge. This sludge and debris will
> gradually build up throughout the oil passageways of the engine, including
> the oil pump and pickup screen. During a normal oil change, an average of
> 1/2 quart of 'sludge' - highly contaminated oil - remains in the engine.
> When the new clear oil is added, it is immediately mixed with this highly
> contaminated oil. The result is oil that is already ladened with wear
> accelerating particulates. This condition is readily visible in most
> engines almost immediately after the oil change, when the dipstick is
> removed and the oil is visibly 'dirty.' Until the development of the
> Engine Flush System, there was no way to remove this sludge without taking
> the engine apart.
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