Too much, _is_ too much. If you added too much in a cold engine,
its worse than in a warm engine. How much is /a little/ ?
If /a little/ is a little to much, you may risk the engine seals.
If it is way too much, you're going to blow the head gasket.
Fix it - better safe, than sorry. Drain from the plug, or suck
via the inspection hole.
Way too much may also damage the catalytic converter. I think that this
warning is in your owner's manual.
How much extra do you have in there? You could just drain out a little.
There are some vacuum devices that can suck some oil out through the
dipstick tube. And some people use this tool to actually drain all/most of
the oil out of the bottom of the engine when they "change" the oil.
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