Welcome to LOST! Is your Jeep a CRD (diesel) or petrol (gasoline) engine? If it's a CRD, you should re-post your question in the "CRD--love that torque!" section. People there will know better. Here's the link:
http://www.lostjeeps.com/forum/phpBB3/viewforum.php?f=5
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2008 Liberty Sport 4x4 Automatic
Jeepin By Al 4" Lift Kit
BFG KO2’s 245/75R16
Full MOPAR skid plates
Rock Lizard Skink Super Sliders
AtTheHelm Front Recovery System & Roof RackM116A3 Trailer build thread: viewtopic.php?f=72&t=77997