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Made an Uh-Oh... forgot to screw the drain plug back in after oil change

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ATL_Rubi

ATL_Rubi

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Got the extra half quart in, only difference that is measurable is the oil pressure now sits at 30 on idle as opposed 27 but I know that means nothing in the grand scheme of oiling the engine.
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ShadowsPapa

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Got the extra half quart in, only difference that is measurable is the oil pressure now sits at 30 on idle as opposed 27 but I know that means nothing in the grand scheme of oiling the engine.
That isn't going to change oil pressure because the pressure depends on the pump pushing a volume against a resistance. You can't add or remove oil and change oil pressure at idle. Consider it a fluke, unrelated to 1/2 quart of oil in the pan.
In other words - 5 quarts vs. 6 quarts vs. 4 quarts - no difference in pressure - the only time it could matter is if you are getting the engine hot enough that the oil temperature is getting high and the viscosity drops. Can't see 1/2 quart making a big difference in oil temperatures, either. Otherwise half the vehicles in the world would be running hotter oil because that's how many aren't right at that "full" mark on the stick.
 

ShadowsPapa

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Worrying about the same oops, I usually stay under the vehicle waiting for it to drain then replace the plug before doing anything else. And it's OK by me if it is still trickling slowly when I put the plug back in. I still got 99.9% out.
I guess we each have our own methods for preventing "problems".
I have a history of severe ADHD and not remembering what I was going to do 2 seconds ago (ask my wife) so I have to leave myself clues along the way.
The OCD part of me (a co-morbidity if I use the word correctly) says that thing has to be empty, no more dripping.
So what I do is I pull the plug, and I get the oil ready to put back in and put the drain plug and wrench with the funnel and the oil. It's unlikely that I'll set the drain plug and wrench aside and go ahead and start putting oil in.
I go off and do other things for a while - check bolts/paint marks I left on the bolts, check brakes, fluid levels and so on. So by the time I'm finished with all my checks, the hot oil should be done dripping. Years of doing what we called "oil change and service" at the shop, where every vehicle had to take at least a certain amount of time or you were not doing a good job of checking the car over for the customer, I learned a process or sequence.
Every customer got the oil and filter change, but also checked for any grease fittings and greased joints as needed, checked transmission fluid level, differential fluid, brake fluid, PS fluid and much more. The windshield got cleaned and the inside of the car vacuumed and several other things I'm sure I left out. That was our standard oil change.
The other thing that prevents me from spacing off the drain plug is that I keep checking to see if it's done dripping.
 
 







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