The 22-year-old Brazilian has played 41 times for the Blues during the current campaign, scoring 11 goals in the process.
However, Oscar is happy to feature regularly for Chelsea as they chase the Premier League title and the Champions League in the coming weeks.
"It's not just this season, I've played so many games in the last few seasons, plus with the national team we are always playing as well," he told the club's official website.
"It's difficult but I enjoy it and I'm fine. We now have the last seven or eight games in the Premier League, as well as the game in the Champions League, so I need to sleep well, have a massage and then I will play well."
Chelsea return to action on Saturday when they travel to Crystal Palace in the Premier League.