I am sorry. Changing oil during a race? They don't even do that in 24 hour races!
It is not required, if it is then your engine has more apparent problems.
The only oil related thing I can think of to do for a race is have someone clean off the oil cooler if the oil is getting hot.
Do I see a pattern here?
You are for it and have no idea how to go about it.
I know exactly how to do it all (I have done it) and I don't care for having it in LFS. You got some details wrong but close enough. I am not going to explain how that headache works.