Hello, I own a Fiat Punto Emotion Pack Diesel and have clocked 73k kms in 3 years of ownership. Earlier I used to get around 15km/l but now a days it has dropped to 12-12.5 km/l. Also there is significant loss in the pickup. It feels way too sluggish specially with AC on. Things look very bad when its carrying 4 adults with AC. The car pulls very slowly. I want to ask the experts what could be the reason for it? Should I get it checked right now or wait till the car hits 75k kms and get due for service?