How could an issue like that not be covered under warranty at 9000 miles? Your dealer sounds shady.
2008 3.0L CRD Laredo: MYGIG with Lockpic, 10" Kicker Sub and Boston Speakers, Tinted tails with LED lights, RC 2" lift, 1.5" spacers, Wrangler SRA's, Bilstein rear shocks, Monroe Front struts, Custom Mesh grill insert, De-badged, SRT8 Rails, Elephant Hose Mod, Resonator Gut, MBRP Exhaust.
Average 10.0L/100KM or 23.5MPG
Next is a Custom Spooling Tune with a DPF and EGR delete.