Hey General Motors,
I'd like to buy a Cadillac SRX, but not until you put a good diesel in it. I
don't want either gas-guzzling engine you currently offer. I want a good
turbo-diesel like MB puts in the E-Class. If you can't figure out how to
make your own turbo-diesel (even after blowing all those billions on the
Fiat fiasco), that's OK, just buy them from MB. I don't mind.
Also, like the guy in Autoweek just wrote, get rid of all the gas engines in
the Hummer line up and use just diesels. Gas engines in those things is just
You need diesels for your all your mid-size on up SUV's. The sooner the
better. Just do it.
Plenty of people will buy them, but only if you beat the other guys to
market with them.
While posting something that GM is obviously not going to do to a
newsgroup probably isn't the best idea if you want to get the top brass'
attention, you have to admit, the OP has a point. GM has lots of Diesel
experience but seems to be loath to put them in any "consumer grade"
vehicles, probably because of the Olds Diesel fiasco back in the 70s.
But it's going to have to be done, sooner or later, as the price of oil
isn't planned to come down to earth any time soon.
replace "fly" with "com" to reply.
Diesels sell very well in Europe. They have for the longest time. They
probably would sell well in North America as indicated by the success of
Volkswagen diesel cars. It's just a matter of mentality. Until recently, we
were never were in gas saving mode but things could change drastically and
the Big 3 are going to have to respond. Diesel cars aren't the slow, smole
producing cars they were in decades past. I took a turbo diesel Volks for a
spin a few months ago and was impressed by the engine's power and
smoothness. All it takes is for the price of gas to go up enough so that it
hurts in the pocketbook. It's coming, IMHO.
I don't know if it's the same in all of Europe but, in France, you are taxed
according to how many "chevaux fiscaux" or "tax horsepower" the engine of
your car produces.
In NA, we seem not to care too much about all of this because we still have
that "if-some-is-good-more-is-better" mentality. Do we really need Hummers?
As for the Olds Diesel fiasco of the 70s, were the engines 100% diesels?
Couldn't agree more with you on diesels. I've had two GM diesel pickups.
6.2's and 6.5's. I'm in the market for a '01-'06 GMC or Chevy 2500 diesel
now. What I'm wondering is, are you sure about the mileage you're getting
with your 2500? If so, that's great. But every one I talk to that has the
trucks with the Duramax gets about 19mpg tops.
A guy I work with can also confirm that. When he pulls his fifth wheel
camper, he still get fairly good mileage and has plenty of power. The
engine was designed for truck use though, hauling heavy loads, not for
cruising the highway on the daily commute or vacation. I have no idea if it
can be adapted.
I clock my mileage and fuel usage religiously (reset the trip meter every
fill up and write it down on the fuel receipt) and I can be very confident
in reporting the following:
In combined city/highway driving that I commute in, unloaded with the AC on
(like I would ever turn it off here in Florida!) I consistently get between
18.5 and 19 mpg. When I say "combined", in my 27.5 mile commute every day
15 miles is turnpike at 70mph and the rest is in town with stoplights and
When I've taken the truck on trips with a negligable load (suitcases and the
wife, but not in that order) and I can keep it on the highway at 68-70 mph,
I can clock 20mpg routinely and have gotten as high as 21 on an extended
run. Remember, no hills here in Florida! Anything over 70mph and the
mileage begins to drop noticably, so I'm pretty conservative on the highway.
Get it up around 80 and even unloaded it drinks fuel, although I can't say
what it will get because I don't drive at a constant 80 but the fuel gauge
does drop quicker.
On trips from where I live in Central Florida to places like Savannah, GA or
Charleston, SC (5 and 8 hours away respectively), towing a 4000lbs camper
with our gear and the dog I can clock between 15-16mpg if I keep it down
below 70mph. The camper is a pop-up so there isn't much wind resistance
since the top sits at the same height as the tailgate so I'm dealing just
with the weight.
These figures have been very consistant for the past 45,000 miles that I've
owned the truck. FYI, I own one of the last LB7 Duramax motors before the
LLY motor came out and the only modification I've done is add a second
in-line fuel filter under the frame rail with a 2 micron element. The only
other thing I wish I had is the 6th gear for the Allison instead of my
Cheers - Jonathan
Thanks for taking the time. Your mileage must be doable, a I did a little
surfing on the GM diesel truck websites and several guys there were also
getting your good mileage. Your engine has that variable inlet guide vane
turbocharger which is supposed to increase the efficiency as compared to the
older engines. The guys I talked to here locally all had older trucks with
the wastegate turbo. Anyhow, I'm getting one soon hopefully.
Now is a very good time to be buying a new diesel truck because the last of
the 2006 model run is still available. When the 2007 models come out you
will have to search pretty hard to initially find the ultra-low sulfer fuel
that they will be required to use, but the 2006's still use the low-sulfer
blend (500ppm) and it is still widely available. Plus when the new fuel
comes out you will be able to use it with no problem in your 2006 but the
converse is not true - the 2007's won't ever be able to use the 500ppm
low-sulfer fuel at all or it could cause damage (according to the label on
the fuel pump). That could potentially put you in a bind if you get a 2007
and can't find the new fuel.
I've never considered the mileage I'm getting to be exceptional since I have
friends with similar trucks all getting similar mileage. Anyone getting
less might have either the 4.10 rear axle or a heavy foot - both of which
will conspire to cut your mileage down. My truck came standard with the
3.73:1 axle although the 4.10:1 was available and I believe is standard on
the 3500 series.
The newer motors not only have the variable nozzle turbo, but redesigned
heads and injector placement as well plus those with the Allison have 6
speeds instead of the previous models with 5 (like mine). The 6th speed is
a double overdrive plus it also has a manual shift rocker switch on the gear
selector lever so you can shift up or down if you think that you're smarter
than the transmission. I've done plenty of towing and personally I've been
very impressed by just how well the Allison works when under load when you
use the Tow/Haul mode.
I'll admit that I got very lucky when I bought my truck. I purchased it in
the window of time between Christmas and New Year's and GM had almost $9,000
in rebates plus what the dealer was willing to take off the price just to
get it off the lot before the end of the year. All told I saved enough
money that the Duramax and the Allison were essentially free and the current
Kelly Blue Book value for my truck is within a few hundred dollars of what I
paid for it new even after more than 2 years and almost 45,000 miles. I
guess timing is everything.
Cheers - Jonathan
Gee where were you when Lincoln was offering a BMW turbo diesel in the Mark
V? Car Mags said it was a better car the BMW and sold for thousands less.
Seems 'everybody' wanted a diesel but the cars sat on dealers lots and
Lincoln dropped it after one year. Both GM and Ford offer diesels engines
in their truck lines but buyers prefer to buy those with gas engines at
least five to one. ;)
Mike, nice to hear from you again. The Mark V tid-bit is news to me, but
irrelevant as you are talking, even if true, ancient history from a time
when gas was cheap in this country.
As for the truck diesels, you astound me with such shallow thought. The
truck diesels that the big three sell in HD trucks are not appropriate for
anything but the largest SUV and work trucks. They are very good doing what
they were designed to do, but cost too much and only justify their cost
under heavy payloads and very heavy use. Since they are targeted at serious
loads, they get poor mileage under "civilian" use. Not interested in such a
thing. What I am interested in are the very modern diesels MB and BMW, for
example, put in cars and light duty SUV's/ They are comparable in cost to
same power gas engines. They accelerate quickly, have good throttle
response, get superb city/highway mileage, and are quiet and smell-free (or
If GM had such engines available in mid-size SUV's they would sell all they
could make. I'd love an SRX that could manage 20 mpg city and low to mid
30's highway and give 0-60 in under 9 seconds. I think a lot of people
The German's are about to start putting their modern diesels in mid-size
SUV's. The domestics cannot afford to sit idly while the do that.
Of course they couldn't sell them in the states that have banned diesels.
Now that wouldn't be very smart of GM, would it.
DC/MB recently said with the coming cleaner diesel fuel in NA, plus with
their newer designs they hope to have an acceptable diesel for all
states in two years.
I expect the much improved diesels of the last several yrs will
eventually be more accepted in NA.
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