He will line up for the Satellite Championship that takes place in Maropeng on Saturday – his second race since returning from worlds in Norway.
The junior ProTouch rider said while he would not rule out going for a win, his first priority would be his teammates.
“Everyone goes to win, but I wouldn’t say I’m going to win. If I get the opportunity I’ll take it, but I’ll go with the aim of helping one of our elites,” he said.
“If the benefit of me racing is to help someone, that’s what I’ll do.”
The 18-year-old has lined up for the one-day race once before and, as the second race in which he ever took part, it is somewhat special for him.
“My dad did it with me and a friend. We started in the second last group, with all the mountain bikers. It was quite a cool experience but it wasn’t proper racing then.”
Oosthuizen has come on in leaps and bounds since 2014, and this year will undoubtedly be one to remember.
Oosthuizen knew then that he was preparing to race overseas, but he by no means could have predicted what soon followed.
He rode his success all the way to the World Championships the following month, where he came crashing back to reality.
He delivered improved times compared to in the past, but he said his results had been far from satisfactory.
The Krugersdorp resident admitted it was “good to get my butt kicked” because it was a reminder of how far he still had to go.
“Although on paper I was strong, I was tired. It was a long season. It’s not a proper excuse, it is what it is, it wasn’t a great race,” he said.
Oosthuizen marked the 21.1km time-trial as his race, but it took one Dutch rider to change the entire game.
“During the time-trial I thought I was going quite well but then in about the last 3km a Dutch guy came past me.
“I think mentally it got me, got into my head, and my confidence just dropped.”
“The time we put into this sport is just too much not to be hard on yourself. If you don’t achieve what you want to achieve, if your hard work isn’t good enough, then you have to up your game.”