Salam, i have cultus carby 06. Masla ye hai ke jab subah subah gari start karta hun tou exhaust(silencer) pe halka sa oil ajata hai and dhuan bhi ata hai, oil change abhi karwaya tha bus 400 km hue hain baqi chalne main tou engine wagera ok hai pick wagera bhi ok hai koi awaz nae hai. Ye oil nikalne ki waja bataye koi.