My blown alky hemi was so rich at idle/staging that we changed all 18 qts of oil after every run. We also changed the oil to cool the motor. The oil came out anyway after each run so we could replace the upper rod bearings so I could tune off of them for the next run.

Once in a while we would reuse the oil for a second run the next day if it looked good enough, most times not.

It took 18 qts in a 10 qt dragster pan to keep the pickup covered up for 5 seconds since 60 pounds of boost did not allow the oil to drain back very quick.
I had one crew guy who did my oil changes each run. It was up to him if we reused it the next day.