Yes, you will need the friction modifier. You can get it at almost any auto parts store. I run the Mobil-1 as well, but still use the modifier, otherwise it'll chatter.
JEEPN
Winter Harbor, Maine
'81 CJ-8 Scrambled, It's a Jeep, Chevy, IHC kinda thing!
'88.5 Zuki, 5" Calmini, Locked, Swamped, Rolled, and just generally broken in right!