It's not ideal, but whether it will actually hurt or not depends on the specific design of the engine. Some engine designs can tolerate excess oil better than others. The most likely problem is that the level of the oil will get too close to the moving parts in the engine, which can result in air being "whipped" into the oil. This is a bad thing for several reasons, not least because the air can get sucked into the pump resulting in "dry" spots in the oil lines.On many cars, the optimum oil level is marked on the dipstick as a range rather than a specific line. A quart over the bottom of the fill zone is almost certainly not a problem. A quart over the top is more worrisome.
yes.
Yes
I would drain off a qt if it was me. You don't want the rotating assembly making contact with the level of oil because it will whip the oil into a froth reducing the oil's ability to lubricate properly.
it wont hurt, the excess oil will eventually burn off
It will not hurt the engine what so ever, But it will make it smoke and might fowl out a spark plug.
Bad very very bad.... engine will get too much oil and overheat and go boom... lots of smoke...
Your really should never put more oil then needed into anything no extra oil will not cause water to get in you obviously have a bad seal somewhere below the water line
I've gotten conflicting info from different mechanics about too much oil. One said no problem, the engine will just "throw off" excess oil and that I need an extra quart if I change the oil filter. The other said that it would cause higher oil pressure and eventually break down the seals.
It's possible to cause foaming in the oil pan, but one quart extra probably wouldn't hurt anything.
Yes, you can mix them.
5 quart's of oil..
4 quarts in the pan and 1 quart for the filter, so that's a 5 quart oil change with filter.