Cleaning Up Diesel

Cleaning Up Diesel
Photos by -Autonet.ca
Peter Brewster
Published: 29 04 2007
Whatever the future holds for the Chrysler group — and new ownership talks were in progress at press time — it is not in dispute that being part of the Mercedes-Benz empire brings access to some of the very best modern diesel technology.

Jeep tested the oil-burner waters a couple of years ago with a diesel-powered Liberty, using a motor from Italian maker VM, which is part of the extended M-B family. That engine, though rugged and undoubtedly powerful, had some old-style diesel clatter.

Now diesel power of an entirely different stripe comes to the Grand Cherokee, in the form of a 3.0-litre V6 common rail turbo blockbuster that pumps out 215 hp and 376 ft.-lb. of all-important torque between 1600 and 2800 rpm.

It is built by Mercedes-Benz, and while it is not one of the Bluetec engines now available in their ML series SUV, it is remarkably clean thanks to particulate filters, and made the prestigious Ward's Best Engines list last year.

This is one of 20 new vehicles the Chrysler group has planned between now and 2009, and takeover talks are not stopping management's plans to forge ahead.

Compared with a 5.7-litre Hemi gasoline V8, the engine most chosen in high end Grand Cherokees, the 3.0 diesel brings up to 30% mileage gains and a definite 20 % fewer emissions. It has fewer service requirements and should last a lot longer. Resale value will be higher.

Official fuel consumption figures are 12 L/100 km city and 9.0 highway, which translates to 24 mpg around town and 31mpg running the 400 series highways.

In a very brief test drive I was impressed by the quietness at idle or at speed, and was reduced to silly grinning by the gobs of torque. In every other way it is your typical, efficient Grand Cherokee. The engine moves the heavy truck smartly for a 0-100 km/h time of a hair less than nine seconds.

A badge on the rear talgate simply states 3.0L DIESEL.

The good devil, however, is not obvious in the details unless you are already diesel-friendly.

If you tow — and a fair number of Grand Chero owners do — hauling with a diesel not only gives more muscle at low rpms but will produce fuel figures that are close to driving without a trailer.

Any Ram owner with a big Cummins mill knows that.

This engine has the same towing capacity as the Hemi — 3266 kg (7200 lbs) — and as much torque, but will give far better fuel numbers under load or running empty.

Diesel power is a natural for a 4x4. The ability to trickle solid, smooth power into the drive train at very low speeds helps a lot in rough country.

Go to the other areas of the world where 4x4s are commonplace and you'll see that the vast majority of Toyota Land Cruisers, Nissan Patrols, Land Rovers, Mitsubishi Pajeros etc are diesels. (Hyundai has a terrific diesel-powered Santa Fe in the Australian market, which will be the subject of an upcoming story.)

I'll admit to being a big fan of modern diesels. I love the torque, the towing ability, the lower emissions and the much better fuel mileage. I also thoroughly enjoy the quietness of today's products and the sheer driveability.

North America lags way behind the rest of the world in the use of diesels for passenger vehicles. American and Canadian car drivers were sold some appalling diesels years ago that turned them off.

They were noisy, crude, and stinky, and didn't like cold weather.

Today's units are a planet away from those old oil-burners.

In Europe almost 50% of new cars are diesels, and that number rises to about 80% when it comes to large sedans. An English, German or French executive is going to choose diesel over gas for his luxurious daily ride not only because it pollutes less and goes further on a tank, but because his car will blow the doors off its gas-powered siblings on the highway. No one thinks of diesel power as having commercial or agricultural stigma.

Chrysler itself has many diesel-powered vehicles in the European marketplace, including (yes!) the ubiquitous minivans and the 300 sedans.

But acceptance by people who choose diesel in an expensive car will be the key to the revolution both in Canada and the U.S.

Maybe this is one reason why the diesel engine will only be offered in upmarket versions of the Grand Cherokee. (Another reason of course would be that high-end trucks make more bucks). The new unit will go into Laredo (unique to Canada), Limited and Overland models, all with the usual complement of features.

The price premium over a Hemi Grand Chero's MSRP is a reasonable $1,500. Thus a diesel Laredo will be $48,510, a Limited $53,775 and an Overland $55,805. They're now on sale.

Now that clean, low-sulphur diesel fuel is the rule in Canada there is little impediment to drivers enjoying the benefits of these engines, except availability and choice.

As Volkswagen, who sell large numbers of TDi versions of their sedans, will happily tell you, this technology works.

Most automakers doing business here have diesels of various kinds elsewhere. Expect to see many more oil-burners before too long.

Government recognition that clean diesels do pollute less, via incentives in the green levy program, would be a big help.

peter.brewster@mail.com

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