In short term, on a milder build, probably would be fine.
One thing you didn't mention Hemi, is what ratio he was running?
I'll start a shit storm here, factory owner's manual calls for 20:1 for break in and 24:1 after, and I run 28:1 in the Banshee, Blaster, and 89 RM250.
I read a report/test on oil ratios, and up to a point, the test engine actually made more power burning more oil.