Jbighouse, you have the V6. That takes 8 litres. Since it is always easier to add a little than take a little out, you might want to put 7.5 litres in with an oil change, run the motor and then top up as required after giving the car a few minutes for all the oil to drain down.
Dwijesh, you have the inline 6 - completely different engine. The correct amount is 6.5 litres for that engine.