Timely oil change...
Buy good quality oil and oil filter and air filter,also buy from some authentic shop.
Car is already 10 years old, it has already achieved its long run time . You can always expect some maintenance work every month from old cars.... dont get dishearted if you have to get some work done
I had a 2003 santro , was in rough condition,every week i used to take it to a mechanic...works as little horn not working to fuel tank not opening to ac not working....old car has a lot of learning curve.i learnt alot about cars from my santro...