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  #1  
Old 06-09-2010, 11:11 AM
dmh7891 dmh7891 is offline
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Default Terrible Gas Mileage

hey im new to this forum, just got a 2000 dodge ram 1500 quadcab 4x4 5.9l a few weeks ago, i put new plugs and wires, changed the 02 sensor and put a mangaflow performance mullfer hoping to see the smallest increase in gas mileage. Im getting a 8.5 in the city and 10.5 on the interstate on my last road trip. SOmething cant be right.......any ideas?
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Old 06-09-2010, 11:45 AM
Blaze 4X4 Ever Blaze 4X4 Ever is offline
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Man! That is tough. My mine is a 2010 and I am getting 17 around town and 20+ HW. Was on back country roads yesterday and drove the heck out of that dodge and still got 15.6.
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Old 06-09-2010, 12:06 PM
City Slicker City Slicker is offline
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What size tires are you running?
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Old 06-09-2010, 12:08 PM
dmh7891 dmh7891 is offline
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265/75/r16, i think stock would be 245/75
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Old 06-09-2010, 12:40 PM
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If you have the 3.92 gears or something even lower, that sort of mileage doesn't surprise me.
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Old 06-09-2010, 01:43 PM
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I am getting between 10-12, with my 4:10 rear. but it has been down around 7-8 too.
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Old 06-09-2010, 02:53 PM
dmh7891 dmh7891 is offline
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I believe the rear end is stock. Not to sure what the stock gears are though on that truck.
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Old 06-10-2010, 01:48 PM
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Did you clean out the throttle body when you did the tune-up? I get about the same in town, but 15-16 on the highway with catback exhaust, tuner, and CAI. Got quite a bump on highway mileage after cleaning the TB. Not much in town, but most of my trips are less than 2 miles.
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