You're correct; those pans are generically called "10-qt" except when filled to the dipstick mark where they're 8-1/2 qts (with filter). The big pan & extra oil is mostly for bearing longevity during hard cornering manuvers at any speed. Remember the Aviad pan has two crank-scrapers and a windage tray that reduce or prevent the 'oil-rope' from dragging down your power. This occurs mostly above 6000 rpm so its not much of an issue for most of us street guys. FYI, with 28" dia tires, 5900 rpm in 5th is 160 mph.... I've run 8-1/2 qts of 10W30 in my Aviad during autocross with its violent low-speed cornering maneuvers for 12 years now and still have 30psi hot at idle & 65 psi hot @4500rpm on an accurate gauge.
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