I was always told the Hemi's need oil. He wants us running 9qts. According to him, the hemis pull a lot of oil up into the right bank and will starv the pick up.
The guy who explained it to me use to work at Chrysler Engineering back in the 60's and 70's with Tom Hoover, that was when Hoover was doing a lot of R&D on oil pans.
I know the issue at hand is not a race motor but a 528 buzzing 7000 RPM is not excatly a grocerery getter.