hey all...i am getting ready for my next oil change (98 ssei) and i noticed that quaker state has a NEW line of oil out...To make a short story shorter does high performance oil (still 10w40) make any difference even if they say its ideal for cars with superchargers?

10W40 is not the right weight for your car. You should use 10W30. I'd prefer to stay away from 'new' oils until enough people use it to give feedback, but in all honesty, any oil will do. I prefer full synthetics myself, and run Mobil1 exclusively.