They just did my first oil change as a part of the Jeep Wave. The receipt says Essential Care oil and filter Package $110. They used Rotella T6 5W-40. Says they used 9 quarts too. I'm assuming its like 8.5 or so. They also rotated the tires for me, even though I swapped the stockers to 38's on beadlocks.
BTW used oil is sent in for analysis, mainly to check for soot. I'll let you know how it looks on a fresh post soon.
I know it seems against conventional wisdom, but I let the computer tell me when to change the oil. it counted down from 100% to 1% and lasted 10,000 miles!
May want to look into this but I dont think the Rotella T6 5W-40 meets the MS-12991 specs . Yes it does take 9 quarts.