At 26,000 miles I'm getting about 15 to 16 on the highway; but around town it get's 11.5 to 12.5. I have Airaid filter and MIT tube plus synthetic oil on engine, trans, and diferentials. 
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"2003 Sage green LUX, wrapped around brush guard with off road lamps, roof mounted SMA light bar, AirAid Jr. kit, Delphi Touchscreen Navigation Radio with a 6 CD changer and more! Also a member of the HOPE (Hummer Owners Prepared for Emergencies) pro
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