I have a mk6 1.4tsi golf, has about 58k mileage on it. Recently i have noticed plumes of white smoke coming out. At first i thought it would just be condensation from the exhaust, but this amount of smoke has never been noticed by me in my 3 years of owning this vehicle. The smoke is quite thick, and is quite visible in my back window. The more i rev the engine the more smoke which comes out. What could the problem be? Something major?