Captain Stabbing, yous so full of it, what? you flying a plane now?

 

2003, Ram 2500, 4x4, QC, SB, 5.7l, 5spd. Auto, 265/70R17, 25k miles - 11.5 MPG average

 

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Now that gas has dropped some I started putting 89 oct in my 04 Hemi instead of the usual 87 oct. the problem is my mileage has dropped. I was getting a combined average of 15 3 now I'm getting 13.0 The truck only has 17,000 on it andI don't kill it when I'm driving it. Gas is $2.77 for 87 and $2.88 for 89 .It's also a 4x4 Quad cab. ThunderRoad.


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Did you reset the overhead console at this change? Did you as a backup figure out the mileage the manual way as well? I noticed on my 5000 mile trip where I paid close attention to my mileage my overhead could be off by an much as 2 mpg according to the overhead. Generally this is based off the overhead was reset before my trip and I kept track of the mileage between Virginia, Yellowstone and back using a few dozen stops along the way. Average mileage on the way out was 17 mpg and mileage on the way back was 20 - 21 mpg. Therewere3factors in my better mileage on the return trip: speed (I slowed down about 5mph because the speed limits were slower on the return trip),downhill (I started thereturn trip at 7500 feet and dropped to sea level), and outside temps.

I found that the outside temp severely effected the mpg of my truck. In the morning I was looking to be about 2 - 3 mpg better than at the hottest part of the day. On the trip out I thought it was due to the elevation gains and I didn't noticeany increased mileage at night until about the3rd day of the trip.

 

Colder airis moredense, putting more air into the engine and slowing down = less drag. Both work.

I don't know if you guys caught Mythbusters on July4th, but they tried tailgating a big-rig and improved their mpg by 40% in a Dodge Magnum. Of course that was at 10ft, so way too close, but even at 100 ft, they got a sizable improvement.Thelast trip I took, I made a point to draft just inside the slipstream of any truck that was going my way and ended up getting almost 2 mpg better than normal at a faster speed.Getting almost 19 mpg on a 4 hour trip, usually at about 75-80 mph. Usually I get about 17.5 at 72-75 mph. I imagine that I'd get low 20's if I'd kept my speed down.

 

32 mile ride to my parents house netted 22.3 mpg on the meter.

And yes I was driving nice.

( CAI and Cat-Back systems installed. )

 

i've got a 03 4.7, i'm getting 15.9, i have flowmaster Super 40s, any suggestions on a programmer? exhaust?

 

03 Ram Quad Cab 4x4 Off Road with the 5.9L, all stock. Averaging 13.5 on 1 long road trip.