2001 Toyota Corolla Oil indicated in the cap of the engine?

I bought a used corolla whit 114,900 miles, I live in a city with an average temperature of 77 Fahrenheit and I want to know if I have to put the oil that say in the cap of the engine (5W-30) or I have to use 10W-40 that I think it correspond to the local temperature. Thanks for your help.