Don't know about the CAP10 but in the Super Decathlon anything over about 6.25 quarts (ish - maybe 6.5) seems to get thrown out. Then you fly it for several hours until it finally gets down to 6, add a quart to bring it back up to 7 and by the end of your first acro flight you're at 6.25 again. I'm sure that will vary according to the specific a/c and engine and the type of acro you fly.
(Edit: OK, I don't actually *know* but you're welcome to my random speculation... )