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GM’s new 4.5L Duramax diesel engine promises a 25% increase in fuel economy while providing 310 hp and 525 lb-ft. The new oil-burning powerplant also needs to pass 50 state emissions while providing the efficiency customers are demanding. GM has already provided some details of the Duramax 4.5L, including that the new diesel is roughly the same size as the General’s compact small block V8, which means it can fit in more than just trucks and SUVs. The 4.5-liter also reduces the parts count with integrated aluminum cylinder head exhaust manifolds and an integral cam cover intake manifold. GM talked to Automotive News about new features of the lower half of the 4.5L Duramax, and they’re just as extensive as the top.

Kids, do not try this at home. Researchers at Temple University have been experimenting with what happens when an electric current is run through fuel. Big boom, right? Well, apparently not.

According to a paper the Temple team has published in “Energy & Fuels”, done right, a small electric current applied to fuel just before it enters the combustion chamber, makes for much smaller droplets of fuel which burn cleaner and more efficiently. The team installed and tested their device on a diesel Mercedes where it showed a 20% decrease in fuel consumption in the lab.

The technology is currently being tested on a fleet of diesel trucks in Pennsylvania. How soon might you see it on a car lot? Actually you may see it on a late-night informercial first.

The company will most likely bring the tech to market is the same one running the Pennsylvania test: Save The World Air, Inc. That’s the same company that sells the MagChargR which is basically a magnet that supposedly does the same thing this new technology does. It’s also the same company that at one time was selling the Zero Emission Fuel Saver (ZEFS) device which was basically a magnet that, um, did the same thing. The RAND Corporation looked into ZEFS and found “at best mixed results.” STWA is also the company that was sued by the SEC for stock fraud.

So, maybe they’ve got something that works this time around, maybe not. The science sounds solid, but only time will tell if it translates into a working product.

According to MotorTrend, General Motors is considering fitting its 4.5-liter Duramax V8 Turbodiesel inside the Cadillac CTS sedan as a stepping-stone between the standard V6-equipped CTS and the barn-burning CTS-V.

The report contends that the Duramax V8 would be an easy fit inside the confines of the CTS’ engine bay with the addition of the CTS-V’s bulging hood. The dual-overhead cam, four-valve diesel V8 puts out 310 hp and a tire decimating 520 lb.-ft. of torque and GM already has a transmission that can handle the grunt. The oilburner currently meets the tougher 2010 emissions standards which would allow it to be sold in all 50 states, and with a reported 20-25% increased fuel economy over the V8 model, the diesel CTS could provide some competition to similar offerings from Audi, BMW and Mercedes-Benz. According to MT, the amount of modifications would be minimal and the addition of the CTS diesel would help to boost GM’s CAFE certification to meet the stricter 35 mpg requirements in 2020.

Starting today, Europeans will be able to order the Fiat 500 by DIESEL. Yes, we know the car’s already offered with a diesel, but we’re not referring to the MultiJet engine here. This is a two-year special run done in partnership with the Italian clothing company. This style exercise is supposed to transform the 500 into an ‘Urban Survival Vehicle.” Apparently, all that’s required for “urban survival” are some DIESEL logos, new trim on the bumpers and bodywork, exclusive wheels, three paint colors, and a dressed-up interior. 100-horsepower cars also get yellow brake calipers. Seeing as how 10,000 “by DIESEL” cars are planned, we have a feeling that the folks who really want one will find a way to get one. This isn’t exactly as limited as some other 500s we’ve seen lately. Thanks to A-rod for the heads-up.

Diesel fuel prices are hovering about 20 above gasoline on average. It seems that automakers are a bit worried this disparity could have a negative impact on their upcoming diesel-powered cars and trucks. While it’s true that Volkswagen and Mercedes-Benz are already rolling out new oil-burners in all 50 states with positive results, there remains a concern that there are only so many buyers willing to spend extra to get a more efficient engine and then pay extra to fill it up. At a Senate Energy and Natural Resources Committee on diesel fuel prices today, a spokesperson for the Alliance of Automobile Manufacturers fell short of suggesting what to do about the situation, choosing instead to highlight the fact that diesel fuel is taxed more than gasoline, whereas in Europe where oil-burners are much more popular, the opposite is true. Reading between the lines a bit, it’s not hard to see his point.

Audi announced today that the new top-of-the-line Q7 V12 TDI quattro that was introduced in production form at this year’s Geneva Show in March (see here) will finally make its way to dealers towards the end of 2008. Equipped with a massive 6.0-liter V12 diesel engine (the first of its kind to be offered in a passenger vehicle) generating an output of 500 HP and an awe-inspiring maximum torque of 1,000 Nm or 737.56 lb-ft, the, Q7 V12 TDI quattro accelerates from zero to 100 km/h (62mph) in just 5.5 seconds and has an electronically capped top speed of 250 km/h (155mph).

Audi has been quietly going about the business of preparing its lineup for a green future, with cleaner and more efficient diesels in Europe, and oil-burners scheduled for the US in the near future. While the German automaker realizes diesel will be big in the next 10 years, it’s also planning for life without emissions. Audi exec Rupert Stadler says the four-ringed automaker is primed to offer an electric vehicle in the next five to ten years. Meanwhile, Audi’s German competition has been talking up its green position, but Stadler points out that the Volkswagen-owned brand has more research resources to exercise its options.

With the emissions belt being tightened both here in the US and in Europe, every automaker is going to have to make huge changes to its vehicles to stay in the game, and Audi is no different. We’re going to be the big winners during these changing times, and while a battery-powered R8 won’t sound as good as its petrol-powered twin, we like the idea of plugging in our sports car instead of filling it with gas every few days.

[Source: Reuters]

Thinking of trading your gas-guzzling SUV in for something smaller, a bit more fuel efficient? You are not alone. The rocketing cost of gasoline, and diesel fuel, is having a ripple effect on the SUV market. With consumers trading in their behemoths by the thousands in exchange for more frugal transportation, dealers are stuck with a surplus of unwanted sport-utes sitting on their lots with values dissolving.

Diesel-burning trucks aren’t immune either. As diesel fuel costs hovering about fifty cents per-gallon above gasoline, some of the bigger oil-burning SUVs and trucks are losing measurable resale by the day. Overall, according to CNW Marketing Research, used SUV sales were down 14% in March alone. With any surplus, come big discounts. It may be a ghastly time to fill a 30-gallon tank on an SUV, but it is the perfect time to negotiate with a dealer for that seven-passenger family truckster you’ve been fancying. No need to hurry — there will be an even better selection tomorrow.

Thanks to Jim for the tip!
[Source: U.S. News and World Report]

Autoblog talks Diesel with Ford Powertrain Directo

CAFE standards are being raised to 35 mpg by 2020, and automakers are working on several technologies to help achieve the lofty standard. The next 12 years will see lighter, more aerodynamic vehicles, but some of the most interesting solutions will be found under the hood. Electric vehicles, hybrids, and small, turbocharged engines will power many vehicles, and diesel engines are set to once again infiltrate our borders, but on a grander scale.

We talked to Ford Powertrain boss Dan Kapp to better understand why diesel engines are inherently more efficient than petrol engines, and we also discussed how and where Ford will be using diesel going forward. Hit play on the video above to take a look.

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Audi’s R8 TDI LeMans concept is a powerful, exotic, and diesel-fueled supercar. Given its one-off nature, few have experienced it firsthand. Last month we told you about Autoweek and Fourtitude’s time behind the wheel, as they drove the concept at an Audi drive event. The 500 hp V12 diesel was crippled by its modified A4 transmission and Audi’s imposed 50 mph max speed, but the smooth power of the German oil burner was still present. The car was also on hand at the New York Auto Show, where low-speed demo drives were offered among a motorcade of Q7 TDIs that acted as pace cars.

Our friends over at Winding Road also spent some time with the R8 TDI, and the online mag had a full spread dedicated to the 738 lb-ft beast. The article is an interesting read, and it also comes with video footage and an interview with the car’s technical project manager. Among the items covered in the video is a segment on how the engineers shoehorned the massive V12 into the R8’s engine bay. Naturally, there’s straight car footage, too. Hit the read link below to view the video.