ok, my problem is that i put a bit too much oil into my engine. why i did that was because by checking my oil dip stick, it showed that i was low on oil. yes it burns oil and i havent gotten to replacing the valve stem seals yet. but anyways, after i poured 2 quarts of oil in and i drove off then a couple minutes later when i was at the red lights, it started shaking abit. i checked the dip stick again, and now it reads full. the next day i gave it a oil change and it doesnt shake as bad anymore. any idea what happened? by the way, when i start driving it drives fine like before.