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Dodge Durango Real World MPG

23 messages,  Last post on Apr 22, 2009 at 2:49 PM

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#21 of 23 Mileage by boowie Jan 18, 2008 (10:14 am)
I read on this edmunds that changing the Factory tires to another of tire will improve MPH.. But I cant find it. Does anyone know the ansewr.
#22 of 23 2000 4.7 4wd - Averaging 15~16MPG by rchii Apr 22, 2009 (8:47 am)
Replying to: steve755 (Jan 11, 2008 12:15 am) We recently purchased a 2000 Durango, 4.7 w/4wd. I was worried that we were not going to get better mileage than the 15 ~ 16 we are. I have tested it several times now and each time it gives me 15.5 to 16 MPG. Only thing is, that is with me driving. When my wife drives, it drops to 13. My '97 Dakota is a 3.9 V6 4wd, and it gets about the same mileage when I drive it. I guess I should be happy. Our Durango was getting about 4MPG due to the PS pressure switch issue. But disconnecting the O2 sensor solved that and brought it right up to where it is. By the way, we have 31x10.50 tires on the Durango. So the odometer/speedo reads less mileage than actual. Technically it is getting even better mileage. Replies to this message: steve755 (Apr 22, 2009 2:49 pm)
#23 of 23 Re: 2000 4.7 4wd - Averaging 15~16MPG [rchii] by steve755 Apr 22, 2009 (2:49 pm)
Replying to: rchii (Apr 22, 2009 8:47 am) You're doing fine, but your wife may have a lead foot, palpitate the throttle, or not know how to use the cruise control. Before I fixed the suspension with non-stock shocks the truck would bounce up/down in the front especially so much that I found it causing throttle pumping no matter how steady I tried to hold the gas pedal. Using cruise when possible avoids that happening.   I would not recommend disconnecting the O2 sensors or letting them get bad. My mpg got better w/ new ones installed, and the default program in the engine control computer with bad or disconnected O2 sensors increases gas flow to avoid overheating due to a lean mixture, and this excess fuel will foul the cat converters more quickly=>$$$, reduce horsepower, and overheat the engine, etc.   FYI - looks like Dodge finally got this motor right in '09 with new heads. Over 300hp, fatter and better torque curve, and better mpg. Why 9 years to do this?

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