The 21-year-old has scored nine times for the west London outfit and cites his friendship with his compatriots as being vital to his adaptation to the English game.
The youngster told the club's official website: “It was very important for me to have them [Ramires and Luiz] here and my adaptation has been so much quicker because of them being here.
“They helped me so much and off the pitch we are good friends. We get along very well and I am sure this will continue throughout our careers here."
Oscar was recently given the No.10 shirt for Brazil and he revealed his delight at following in the footsteps of the likes of Pele, Zico, Rivaldo, Kaka and Ronaldinho.
|9/1||Oscar is 9/1 with Coral to score two or more against Steaua Bucharest
Stamford Bridge will host an international friendly between Oscar’s Brazil and Russia on 25 March and the diminutive playmaker would love to feature in the game, with the possibility of scoring a goal leaving him lost for words.
He added: “To play at Stamford Bridge for Brazil would be great. To play for the national team is already special but to do it here would be a very special occasion.
“If I score a goal, I can’t even explain. It is already such a special occasion to play at the home of my club for my country.
“I hope I can play in this game and then go on to play in the World Cup.”