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Old 09-19-2017, 07:36 AM   #4 (permalink)
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Originally Posted by Old Tele man View Post
STILCO™ oil filters back then used toilet-paper rolls as their filtering media. And, they worked -- black oil went IN, clear honey colored oil came out, but the eventual loss of anti-acid chemicals (sulfur in gasoline) slowly caused the "clean" oil to stink like rotten eggs and attack metal, especially aluminum.
There are materials you can add to remove the acid from oil
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