My experience with petrol car was with Santro, 2001 model. I should say that by the time it reached 75k kms in the odo, it started giving major issues (clutch, AC etc) and each service was very costly. At the end, before selling off my car I decided to fix all the problems, which I had skipped during regular service, and the bill came to be around 15k (3500 for some paint job). Similarly my friend who owns an Alto, has reached 70k in 7 years and now, something serious has gone wrong and he cannot drive, and it seems like some engine related malfunction. Considering these experiences, I feel Petrol cars will tend to be a lot costly to maintain after it crosses 70-80k mark. Maybe the Honda ivtec's are an exception.