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Long story short (details are irrelevant ... and embarrassing), I may have introduced some atmospheric contamination in my recent oil change. Basically, small dust and dirt flecks, that sort of debris. I only realized this after I started the my car with the new oil.

Everything seems to be running fine, but I'm quite paranoid about something eventually causing damage.

Would that have been caught by the filter? Is there any harm (other than to my wallet) in changing it immediately again?

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    If you've run it already, the damage is done and the contaminants will be trapped by the oil filter. – cory May 17 '17 at 13:16
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    I agree with cory here ... though I doubt much damage would be done. The filter is going to catch anything which you'd be able to see. The only thing which would take punishment (in most engines) is the oil pump, but I doubt much would have occurred. Still, the filter will clean the stuff out. – Pᴀᴜʟsᴛᴇʀ2 May 17 '17 at 16:26
  • @Pᴀᴜʟsᴛᴇʀ2: isn't the pump located "downstream" from the filter? ie.: if the filter caught it, it would have caught it before it reached the pump, no? – Recovering Nerdaholic May 17 '17 at 17:01
  • Not in most cases. Usually oil flows from the pickup to the pump, then it's first stop is the filter. From there it goes out to the rest of the engine (can go anywhere depending on how the engine oil flow is engineered). – Pᴀᴜʟsᴛᴇʀ2 May 17 '17 at 18:29
  • Depends on opportunity cost. – danny117 May 18 '17 at 1:26
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Yes, change your oil again, but most importantly the filter. If there were significant contaminants in the oil then they will likely have been trapped by the oil filter, and if there's enough contaminants the filter could get prematurely filled. Changing the filter means changing your oil.

  • Yes, by "changing", I always mean oil and filter. – Recovering Nerdaholic May 17 '17 at 15:16
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    That was more for the world at large's benefit @RecoveringNerdaholic. – GdD May 17 '17 at 15:17
  • fair enough, just wanted to clarify what I meant. – Recovering Nerdaholic May 17 '17 at 17:02

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