I like and use 5W20WT straight Valvoline oil in my race motors with solid roller cams on E85 fuel. I do trim the bypass springs on the Mellings and Speed Pro high volume oil pumps I use to get 10 lbs. per 1000 RPM with hot oil, IE 70 lbs. at 7000 RPM with 160 F + oil temps up
I run loose bearing clearances(.004+ on the mains and .003+ on the rods ) and oil the rocker shafts full time also shruggy

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)