gentlemen, Our cars spin to 8400 rpm and pull stupid hard @ 6ooo rpm as we all know<--- FACT. With that said, if you drive the car the way it was meant to be driven you WILL burn/consume some oil wether it be a 1/4 quart or 1 quart every 2-3 thousand miles. The "Black powdery substance" on your bumper above the exaust tip is a result of running rich. All itr's were designed this way to be on the safe side of detonation (remember it is a full race inspired car. white/grey smoke (good), blue smoke (Bad) ,Black smoke (boost/nos...).
I use 5w-30 castrol syntec and all other fluids oem (for street). and if i could bang my car i would LATES!!!!