[AT] Ram fuel mileage

Tom Armstrong toma at risingnet.net
Fri Jun 13 15:10:02 PDT 2014 

I notice my 89 IDI Diesel has dramatically more power during  cold weather, I would think this would mean better mileage.  I rarely check mileage but I think it gets about 45.

Spencer Yost <yostsw at atis.net> wrote:

>Hey herb,
>
>It's a 2011 VW Golf TDI 2door hatchback with the manual 6 speed transmission.   One of the last of the Wolfsburg, Germany cars.  
>
>My commute, each way, is 45 mile interstate and 18 miles of country roads with just a half dozen stop signs.
>
>
>In pure city/suburb, I still get 37-39mpg winter/summer
>
>I have never understood the difference in the seasons.   My only hypothesis is general thermal efficiency.
>
>Hope this helps,
>
>Spencer
>
>Sent from my iPhone
>
>> On Jun 13, 2014, at 15:29, "Herb Metz" <metz-h.b at comcast.net> wrote:
>> 
>> Have not been very attentive of some posts, but I sure noticed the 44 and 
>> 47.  Your VW Golf diesel is what year? what transmission? sedan? your 
>> principal transportation?  Engine size? Etc?
>> Herb
>> 
>> -----Original Message----- 
>> From: Spencer Yost
>> Sent: Friday, June 13, 2014 3:04 PM
>> To: Antique tractor email discussion group
>> Subject: Re: [AT] Ram fuel mileage
>> 
>> Thanks for the clarification.  I thought the urea was for the DPT and urea 
>> was somehow burned during regen.   I did not realize it was NOx reduction 
>> instead of the detune.
>> 
>> I average 44mpg in the winter, and 47mpg in the summer (fill-up 
>> calculations - not computer) with my VW golf diesel.   I can't imagine 
>> Exhaust Fluid raising it much more than 3% and am very glad I have a spare 
>> and no exhaust fluid.
>> 
>> BTW:  Am I the only one who think exhaust fluid sounds like the old "blinker 
>> fluid level" joke?  (-:
>> 
>> Spencer
>> 
>> Sent from my iPhone
>> 
>>> On Jun 13, 2014, at 10:36, Stephen Offiler <soffiler at gmail.com> wrote:
>>> 
>>> Most of the diesels available new in the USA are using DEF (that is Diesel
>>> Exhaust Fluid and is the common name for the urea that Spencer mentioned).
>>> There are some exceptions in the VW TDI lineup.  It's all a matter of
>>> meeting the US emissions specifications.  If they can tune (or detune) the
>>> engine to meet emissions without DEF, then they might choose that route.
>>> For example, VW detunes the Jetta TDI and omits DEF, resulting in slightly
>>> lower fuel economy versus the Passat TDI which does use DEF.
>>> 
>>> DEF controls oxides of nitrogen, not particulates.
>>> http://en.wikipedia.org/wiki/Diesel_exhaust_fluid
>>> 
>>> Yes, the new Ram Ecodiesel engine requires DEF.  Ram claims 11 gallons per
>>> 10,000 miles which is 909 miles per gallon DEF. Some Internet forum
>>> discussion reports actual consumption rates slightly above 1000 miles per
>>> gallon DEF.  1000 is a nice round number.  NAPA sells 2.5 gallon jugs for
>>> $14 (= $5.60 per gallon DEF) but it is starting to show up at gas stations
>>> for reportedly as little as $3 per gallon DEF. Let's just call it a nice
>>> round $5 per gallon.  That's an additional expense of $5 per 1000 miles on
>>> top of fuel cost.  At 25 MPG and $4 per gallon for fuel, it costs $160 for
>>> fuel to drive 1000 miles, so just make that $165.  If you were to think of
>>> DEF like some sort of fuel surcharge, it works out to 3%.
>>> 
>>> As a side-note, particulates are controlled with a Diesel Particulate
>>> Filter (DPF) which is built sort of like a catalytic converter but it
>>> doesn't do any catalyzing.  It traps the particles and then periodically
>>> heats WAY up (650C plus, which is 1200F plus) to burn the collected
>>> particles down to ash.  This is called DPF Regeneration.  It will happen
>>> naturally if you drive hard enough to get it that hot; otherwise it will 
>>> be
>>> forced to happen periodically (about every 500-1000 miles) by injection of
>>> extra fuel.
>>> 
>>> SO
>>> 
>>> 
>>> 
>>> 
>>> 
>>>> On Fri, Jun 13, 2014 at 9:08 AM, Spencer Yost <yostsw at atis.net> wrote:
>>>> 
>>>> One side note.  The diesel they build for the Chevy Cruz American market
>>>> uses urea injection for particulate control.    The urea tank is just
>>>> another tank to fill and eliminates the spare tire.   They give you a can
>>>> of fix-a-flat instead!
>>>> 
>>>> Not sure about about the larger engines.   I was only looking at cars.
>>>> In the end my wife decided to keep her VW diesel jetta (fuel is used for
>>>> particulate control) and run it into the ground.  Which is proving hard 
>>>> to
>>>> do (-:
>>>> 
>>>> Spencer
>>>> 
>>>> 
>>>> 
>>>> Sent from my iPhone
>>>> 
>>>>> On Jun 13, 2014, at 0:55, "Sewell, Steven" <sewell at ohio.edu> wrote:
>>>>> 
>>>>> Dennis keep us updated on the truck. The same diesel is an option in the
>>>> Jeep Grand Cherokee.  I've been looking at the Jeep for our "car"
>>>> replacement in the next year.
>>>>> 
>>>>> Steve Sewell
>>>>> Albany, Ohio USA
>>>>> sewell at ohio.edu
>>>>> sewell at atis.net
>>>>> ________________________________________
>>>>> From: at-bounces at lists.antique-tractor.com [
>>>> at-bounces at lists.antique-tractor.com] On Behalf Of Dennis Johnson [
>>>> moscowengnr at yahoo.com]
>>>>> Sent: Thursday, June 12, 2014 12:56 PM
>>>>> To: at at lists.antique-tractor.com
>>>>> Subject: [AT] Ram fuel mileage
>>>>> 
>>>>> All,
>>>>> The mileage numbers were calculated after entering gallons and miles
>>>> into a spreadsheet. I also did trip average for the long trips via
>>>> spreadsheet. I also do a running 3 tank average to check for incomplete
>>>> fill ups, etc.
>>>>> I do not have a good way to account for idle time, etc. truck records
>>>> idle vs drive time, but not sure exactly what to do with this other than
>>>> keep for general information.
>>>>> I am guessing the screen numbers on the dash are a little bit high, but
>>>> still impressed with the truck.
>>>>> Thanks
>>>>> Dennis
>>>>> 
>>>>> 
>>>>> Sent from my iPad
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