I won a 2015 LR4 LUX V6 supercharged and the engine oil was overfilled. I drained the oil and changed the filter and when I started the engine it would not gain rpm's and took many times cranking it to keep it started. I read the codes and got back low voltage on camshaft sensors and multiple misfire cylinder 4, 5 and 6. Changed the spark plugs and the engine would start up and idle but wouldn't go past 3000 rpm. Changed the spark plugs again and the engine ran better but still wouldn't go past 4000 rpm. I figured that the over fill probably coated the engine with oil and was fouling the plugs, i wanted to let it run and warm up to help get the oil back to normal. The engine shut down and would not start back. Proceeded to change the spark plugs again and found oil in the tube around the spark plug at the closest plug to the cab on the drivers side. The spark plugs are very coated with oil and think they are fouled again. But what has me concerned is the oil in the tube where the spark plug is. Any thoughts of what could be going on with the engine from the over fill?