I don't know the answer but the clearer you can make your question, the more useful the answers will be.
I would imagine it depends massively on the length of the race, among other variables.
If router can log traffic then you can see it in router log, if not set up you mobile as hotspot , connect PS3 on, play game and watch how many bytes... it will transfer during event.I dont think it is more than few mb for one race.
Thx for the replies but I don't have the equipment to do it myself. I only see at the end of the month (on the bill) how much data I used. So unfortunately, that's not an option.
@Famine Just might be off topic, would the same if I played a PC game online, That it would'nt take to much Data out off my allowance a month? Sorry if this of topic.