Make sure what ever brand you purchase is API rated CI-4 OR CI-4 Plus! These oils have the correct base stock and additives needed for the 2005 year model Jeep CRD!
Current CJ-4 & CK-4 rated oils are especially designed to sustain emission control systems durability in diesel engines installed starting in 2010 and later model diesel engines where particulate filters and other advanced aftertreatment systems are being used. They should not be used in Jeep CRD's due to their lower zinc levels and package additives...
There are several good brands available that currently meet the CI-4 OR CI-4+ API ratings!
Anything else is a real gamble and should not be used in the Jeep CRD engine...

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Supporting Vendor and Moderator of LOST05 Jeep Liberty CRD Limited 
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount98 Dodge Cummins 24 Valve