I find it awkward to add a small amount of oil from a full quart container. Instead I pour the amount of oil I want to add into another empty container, and add oil to the engine from that.
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Oh, so the engine does have a dipstick
In that case, I wouldn’t fill beyond the max mark
I just use a funnel
There is not a shred of evidence that having the oil at Add line hurts a thing.
Good grief, why do you have to attack so many people that come to a discussion board asking questions and seeking discussion?
OP didn’t know something, so they asked. That is what we are here for.
as for an answer to overfilling, It’s probably not recommended to go over what the engine manufacturer and designer intended. Having said that, I do add 5qt when an engine calls for 4.7q. I ain’t got time to be measuring .7 of a quart. 
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