Here is what I have found on MPG with my 98 R/T Club Cab :
Engine mods :
180 stat
14x3 FABM
Brass Cap and Rotor
Magnecore Wires
Mobil 1 Full Synthetic
This is what the truck runs with every day on the street .
I took a trip to SOuth Florida last September . The truck had about 8K
miles and driving between 75-85 without the AC on , I got about 15.5 MPG .
On the way home I ran about 70-85 with the AC on and got less than 15 .
Thanksgiving of 98 I drove to Southwestern VA (about 650 miles) and
purposely drove *NO FASTER* than 60 MPH to see how good I could get my MPG
. I ran the truck almost all the way empty on a tank at a very steady 60MPH
and got 20.5 MPG on my first tank , and something like 21 on my second .
On my way back , I drove normally , around 75-85 , and again ,my mileage
dropped back around 15-16 . The AC was not on during either of these times .
I have continually found that , and I presume this is due to the gearing
,that if you keep the truck at 60 MPH on the hiway , for a real long trip ,
without using the AC , you *can* see 20 MPG .
At 60 MPH the truck turns right at 2000 RPM in overdrive , as soon as you
get over 2000 RPM , the MPG drops exponentially .
I usually see around 13-13.5 in town if I take it easy .
At 10:12 AM 8/20/1999 +0000, you wrote:
>Jason, many factors come in to play here. I have 3.92 gears
>as well and expected much lower mileage than I'm getting. I
>know some R/T owners with close to your same setup getting 18
>to 20mpg hwy (I think Jack Hilton was one). On the other hand
>I know of one NUT (not a DML member) who installed true duel
>exhaust w/o cats on a stock 97 V6. Of course his torque plummeted
>and he gets 12 mpg!! DOH! I have a hard time believeing your
>trucks not capable of getting better mileage with similar DML
>proven mods.
>
>GS -
>
>>
>> Well I've got myself a 98 SLT+ CC 318 3.92.... with the ole MSD ignition.
>> My average 'round town numbers average out to 12.5 and highway is something
>> like 13.8. It's got 9700 miles on it and I've had it for 1 year 5 months.
>> My mileage just plan sucks compared to everyone else's and I don't know
>> why?!
>>
>> Jason
>>
>>
>>
>> >I'd love to be getting 15.8 MPG. My R/T is stock except for the tonneau
and
>> >has 8000 miles on it. Last weekend I went 200 miles each way of highway
>> >driving. Got 14.8 on the trip out and 15.0 on the return. Average MPH was
>> 59
>> >out (rush hr. traffic) and 65 back. This is a small improvement over the
>> >14.7 MPG on the same trip in April.
>> >
>> >I am sure some mods will increase the MPG. By the way the tonneau didn't
>> >make any noticable difference in MPG.
>> >
>> >Weldon
>> >99 R/T CC DA in San Jose
>> >
>> >
>> >
>>
>
>
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Jack Hilton III
Black 1998 Dodge Dakota R/T Club Cab
Charter Pipeline......the Next Wave.....
http://webpages.charter.net/hemi/jbd1.html
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