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Arguably, you "could" remove the filter, very carefully to avoid spilling the oil in it, remove the cartridge (with the canister still full) and replace with new cartridge, and loose no more than a few ml. Removing the filter cartridge is not like removing drain plug. The only oil you will get is what is in the filter, regardless if the engine is drained or not. You're likely aware of this, but seems lots are not. This is why it's easy to do a filter inspection without changing or draining the oil.
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