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Re: Oil change interval question - synth. (Dickinfallschurch?)
Posted by Dick in Falls Church (more from Dick in Falls Church) on Wed, 14 Feb 2001 20:21:32
In Reply to: Re: Oil change interval question - synth. (Dickinfallschurch?), MichaelG, Wed, 14 Feb 2001 11:26:13
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If one had to change oil based on color, diesel owners would be changing about every 20 minutes!
Most of the "dirt" one sees inside an engine is caused by the oxidation of the non-synthetic engine oil. Very little is introduced through or around the air filter, and most of that would be picked up by good oil filters.
As JohnB pointed out, oil analysis over the past almost 30 years has shown the ability to extend drains with the proper oils.
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