The 21-year-old is keen to build on a strong debut season, which saw him score four goals in 34 league appearances, and has started all four of Chelsea's games so far this term including netting in their season-opening win over Hull City.
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"I feel a lot more confident this year and I am sure that I am going to score a lot more goals," he told the club's official magazine.
"I am ambitious for this season and I am happy with the way things are going for me at the moment. We have started well and I want to make sure that this is a big year; a year in which Chelsea win titles.
"I started my first season well and the other players welcomed me and helped me to develop, all of which helps me and contributes to this season.
"Now, I am feeling even stronger and I would like to play as many games for the team this year as I did last year."
Oscar will now turn his attention to his upcoming international duties, which will see Brazil take on Australia on Saturday and Portugal three days later in friendly matches.