Oil did not drain from 2016 Toyota Camry Hybrid

Maintenance/Repairs
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1

100k miles. Today was the third oil change since we bought this car at 85k miles.
As before, I loosened the oil fill cap so air could enter, then I unscrewed the plug in the oil filter housing, and snapped in the plastic drain spigot that comes with the oil filter. Oil began to pour out as usual so I left for a half hour.
When I returned it had stopped draining, so I snapped out the plastic spigot, replaced the filter, put everything back and added 4.7 quarts of 0W20 oil and started the car.
No leaks, so I shut off the car and pulled out the drain pan. WHAT THE HECK?? It had less than a quart of oil in it. Pulled dipstick, and, as expected, the car is WAY overfilled with oil.
Before I repeat the whole process, has anyone seen this happen before? What should I do differently?
My only thought is that perhaps the plastic drain spigot did not snap all the way in, but it felt normal snapping in and snapping out.
Thanks for your suggestions!

2

Reading through your post it appears you forgot to remove the drain plug and drain the oil pan.

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3

Sometimes I scare myself.
I clearly remembered previously using the little plastic drain spigot and I was thinking that in this system the filter must be the lowest point in the system.
After reading your response, I went out and slid under the car and stared at the drain plug on the pan (which is clearly lower than the filter) and I honestly have no recollection of removing that plug before. Clearly I did, because I ended up with over a gallon of waste oil each time and the oil level was correct afterward.
Thank you!

4

You are not the only one to drain only the filter;

5

Right, the plug at the bottom of the oil filter only drains the oil that’s in that filter. It doesn’t drain the oil pan. My guess is the drain plug is a 14mm head bolt.

6

I can’t speak for anyone else, but I never mess around with the oil filter drain. Takes too much time. Just undo the housing, throw in the new filter and o-ring, and spray off the residue.

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7

I do the same as @asemaster, I find the filter drain to be clumsy and of little benefit.

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