I can't see any reason to do a 'topside' oil change and many reasons not too.
Everything will migrate to the pan that is missed by the (bypassing) oil filter
or falls out of suspension of the oil. Draining warm oil from the sump will get most of that out. It's not rocket science or terribly hard to do. I would bring it somewhere to get it changed long before I would ever consider sucking it out the top. In the end it's your engine, you can pay now or pay (more) later...
Everything will migrate to the pan that is missed by the (bypassing) oil filter
or falls out of suspension of the oil. Draining warm oil from the sump will get most of that out. It's not rocket science or terribly hard to do. I would bring it somewhere to get it changed long before I would ever consider sucking it out the top. In the end it's your engine, you can pay now or pay (more) later...
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