B) Use straw and suck it out lor... hehehe.
No lar, u can drain it out at workshop or yourself. Better to have accurate level. 1CM is kind of much. 1-2mm is ok. 10cm....... most likely u can have erratic oil pressure. Or the gaskets in the oil pan might be doing a little more work holding them in. Liquid pressure my friend. U probably got 50ml more. Next time remember 4 litre is more than anough for every engine. About 3.5L is about rite. Next time use a kitchen measuring cup for accuracy. heheh.