Posted by Vaughn [162.158.255.209] on Sunday, April 03, 2016 at 20:15:56 :
In Reply to: question about sludge in oil pan posted by junkyardog [108.162.219.180] on Sunday, April 03, 2016 at 14:18:08 :
This subject has come up more than once and the debate goes on whether slug is good or bad in a partial filtering system. It wasn't a mistake that Chrysler design a pan to form slug, but by intended design. The engine is a partial filtering system, not 100% filtering, but 10% of the oil circulate is filtered by the oil filter. This means 90% is not filtered, and as a result, particles are allowed to circulate to moving parts. This design was to ensure that the engine always had lubrication when maintenance would be neglected. The oil filter will plug at 10,000 miles, but oil will still circulate, although not clean, it will continue to lubricate a neglected engine. Ok, how do you capture particles not filter? You design a pan that will allow the formation of a sludge layer to capture and hold contaminates when the engine is no longer running. Gravity pulls contaminates to the sludge lay where they are held. This further cleans the oil of unfiltered contaminates when the engine is not running. I have yet to hear of a partial filter engine that seized from sludge.
100% filtering does not require a sludge layer and all oil should be drained by a pan that allows it.
This debate will continue to go on, but rest assured, the engine will continue to run with your sludge layer.
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