post oil change and filter question

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Jun 18, 2007
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so i changed my oil yesterday. i am using the last of my BOGO synpower (will be switching to PP) i ran 7500 miles on this oil run.. a question that i have been pondering is what exactly is trapped in an oil filter? i allowed most if not all the oil drain out of the purolator (regular one) and compared to my new regular purolator and that sucker was much heavier.. i mean what can be trapped other than very small particles?? is it just the filter media soaked in oil causing it to be that much heavier? just something i have always wondered..
 

ctc

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Nov 5, 2008
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How long did you let it drain? There's probably some oil still in it due to the adbv. It will drain out slowly.
 
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When you drain the filter, do you poke the ADBV with a screwdriver or something? If not, do it next time - it creates a vacuum and the oil can't drain out.
 
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Jan 10, 2008
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Even in a regular (nitrile not silicone) ADBV the oil will sit behind it for a month. Punch a hole in the can, or poke the adbv with a screwdriver. I doubt all the metal shavings and fly legs your fiter catches weigh a noticeable amount.
 
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Jan 29, 2006
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Even if you make a hole in the filter, it will be heavier than a new filter. It is the difference between a wet towel and a dry towel. The oil held in the old filter will always outweigh the material trapped on the filter.
 

mikeg5

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gotcha thanks guys.. it was just something i have noticed and was curious.. i would hope that weight wasnt from wear metals LOL..
 
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Just the fact that the media is soaked with oil will make it heavier. As others said poke a hole in the filter. I poke a hole in the dome, sit the filter in a large funnel which is in a gallon container and let it drain for about a week. That gets most of the oil out, but the media is still soaked with oil, and the used filter is heavier. AD
 
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