All the best for your trip. Few inputs - I did Indore - Pune-Bangalore-Vellore tour two years ago with one night halt at Satara and returned via Pune-Mumbai (break at Mumbai). It was 3600 kms total. The return leg roads were good and you will be probably taking the same route. I faced problem of tyre puncture on Pune-Mumbai expressway during an earlier trip (by Indica), probably due to heating on concrete road. Another problem is of PUC certificate. In MP, we don't see the PUC vans / centres and people usually don't have it and no one asks. But when they enter Maharashtra, police catches them. Anyways, a new car is exempted for the first year.