hi, i just got a aurion sx6, the 1st few days i had it it flew and went so good. i got abit excited and sortve stepped on it whenever i could the first 3 days as i had a vx on gas b4 and this was a big difrence in power for me. recently, whenever i step on it, not even much, like when i overtake on lights etc, a ugly gassy smell comes out. the engine bay doesnt seem to smell at all. the exhaust smells. as what they say like a egg fart. (so ive been told) anyway, it only happens when i take off fast to oevrtake other cars. i dont speed. i was just excited the 1st 2-3 days. testing the car out as they say. what can it b? there is a lil bit of muck in the exaust pipe when i looked at it after i stopped to smell it. like engine oil color. just a touch. not much. like grease maybe. please help. im a girl and dont reeli uinderstand much bout cars.