Sugst me 2nd hand car that occure minimum maintance as i am 1st tym purchasing car, my budgt is 1.5lkh,,?

i want to buy 2nd hand car, and m 1st tym purchasing car, my budget is 1.5-1.75laks, suggest me d car that hv minimum maintenance, m staying in Mumbai soo which type of car i hv to buy? (petrol car or CNG car?) and i am thinking to buy sentro and swift.