Tesla is now on its fourth CEO in just 12 months as the fledgling all-electric automaker has announced today that chief fund-raiser, architect and Chairman Elon Musk will take up the mantle from current CEO Ze’ev Drori. Early this morning Valleywag reported that Tesla would be firing up to 100 of its staff and that Drori might be leaving. A call to Tesla SVP Darryl Siry revealed that the story was not entirely accurate. Drori is not leaving the company, but will move over to become Vice Chairman. Exactly what that means is not entirely known at this point, although clearly Musk intends to take a more hands on role now that his Space-X rocket finally managed to get into orbit. Tesla is also laying off some staff, although the extent of lay offs is unknown at this time. Siry promised an official announcement sometime this morning, but we’re still waiting.

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.

As the AMM fleet rolls across north Texas, my co-driver Steve Ewing and I are currently on the tail of the Q7 piloted by Kevin Kelly and the legendary Jim McCraw. Jim, a veteran of four One Lap of America events, is used to these long slogs. Actually, for Jim this is more like a luxury cruise. On the One Lap, the teams circumnavigate the country in only a week, often ending up sleeping in cars and cheap motels. For us, the longest leg was the run from Chicago to Memphis, a trek of nearly 550 miles (more for those whose nav systems got confused among the Chicago skyscrapers).

Jim and Kevin managed to top the charts yesterday on the stage from Memphis to Little Rock to Dallas with 30.3 mpg while Steve and I only got 28.6. Jim managed to get hooked up behind a semi that was cruising at a good clip for an extended period of time, while we had trouble finding any trucks running faster than 60-65 mph. The day before, on the trip from Chicago, we tied at 28.8 mpg although Jim and Kevin had a slightly higher average speed at 63 mph vs our 60 mph. We’ve since become aware of a couple of tricks that seem to be helping, which I’ll divulge at a later time. Never let it be said that journalists aren’t competitive. As I finish writing this paragraph, a slightly faster truck passed us, and Steve has slipped in behind it. As we slid past, I glanced over to see a very unprofessional finger gesture from Mr. Kelly. Kevin and I will be discussing that tonight over steaks in Amarillo.

It may look more than a bit, um, quirky, but so did the iconic 2CV that the C-Cactus concept was meant to embody. Built to do more with less — materials that is — the Citroen C-Cactus concept that was shown last year at the Geneva Motor Show used innovative construction techniques to cut the number of components required to manufacture it in half and is what Citroen calls an essentialist vehicle. A production version would attempt to follow that same pattern and could be powered by a version of the French automaker’s new HYmotion2 hybrid system, consisting of a 1.0-liter diesel coupled to an electric motor. The powertrain could return over 100 miles per gallon according to the automaker. Another possibility would be to go full electric with the goal of achieving a 100 mile range and a 70 mile per hour top speed. Just how much of the concept’s radical look would be carried over remains to be seen, though being Citroen, we’re sure it would be suitably radical no matter what.

One of Citroen’s big debuts at the Paris Motor Show was its HYmotion4 hybrid technology, which was fitted to the Citroën Hypnos and C4 WRC along with the Peugeot RC and Prologue. Unlike most hybrid systems, the French technology has no direct connection between the car’s engine and battery, so the pack is recharged “through the road” when the car’s regenerative braking is applied. There’s a 125-kW electric motor attached to the rear axle that gets its power from 990 individual lithium ion cells wired up to produce 400-volts. The C4 WRC’s driver can select from a number of modes to allow a specific amount of electric assistance, including running solely on the electric motor or using it as a short-term boost for added acceleration. This way, the car can be run in zero-emission mode or at full power, depending on the situation. Although no production machines have been announced with this new technology, the fact that the automaker has created four separate concepts with it shows that it is serious about its production possibilities.

Rumors of RUF’s impending electric Porsche were true, except that the actual vehicle is based on a Porsche 911, not the Cayman as previously reported. Powered by a three-phase electric motor that offers about 200 horsepower along with an impressive 480 lb.-ft. of torque, the eRUF Model A can reportedly hit 60 miles per hour in under seven seconds and can reach a top speed of 160. Power comes from a lithium iron phosphate battery pack, which produces 317-volts and 480-amps and is made up from 96 individual cells. A full charge takes a rather long 10-hours, and regenerative braking is included in the package allowing for a range of up to 180 miles. From the outside, you’d never really know that something was different about this 997, except that it doesn’t produce that soul-stirring flat-six sound. This is still just a concept and its specifications are subject to change. We can be sure, though, that this isn’t the last electrically-powered sportscar set to hit the market.

Saying that “only a fool would ignore” the emissions of a new vehicle and the current global economy, AMG head-man Volker Mornhinweg realizes that it can’t keep building gas-guzzling supercars with reckless abandon. Not that the company will lose its performance edge, mind you. In fact, hybrids and diesels could offer a meaningful performance boost if tuned properly. How so? Torque. Diesel engines are known for their massive axle-shreading twist, and electric motors, an essential part of any hybrid powertrain, make maximum power right off idle, allowing for an internal combustion engine that’s tuned for stratospheric revs.

In a recent interview with CAR, the notion of fitting a twin-turbocharged 3.0-liter oil-burning V6 inside the C class was kicked around. Mornhinweg suggests such a vehicle is a distinct possibility as AMG moves forward. Hybrid technology could be based on the new drivetrain powering the recently-unveiled S400 BlueHYBRID. No matter what the future holds, we can be sure that the AMG crew is obviously not made up of a bunch of fools, and will therefore continue to offer cars with the highest performance pedigree, regardless of what’s underhood.

Mercedes-Benz really wants you to know how green its new line of diesel vehicles can be. To that end, the German automaker calls them Blue and capitalizes EFFICIENCY. Subtle, no? In an effort to earn the badge, MB has tweaked its largest and most luxurious model with a 3.0-liter diesel engine, a seven-speed automatic tranny that decouples itself at stops, a power steering pump that only operates when necessary and low rolling resistance tires. Those are pretty simple changes, no complex electric motors here. Fuel mileage, though, is rather good for such a large vehicle, coming in at nearly 31 U.S. miles per gallon. In contrast, the marque’s upcoming S400 BlueHYBRID only manages about 29 miles per gallon. If this sounds to you like it makes a resounding case for diesel vehicles, you’re right. It does. Unfortunately, MB only mentions German pricing for the S 320 in the press release after the jump, not indicating whether the big blue sedan will be sold on our shores anytime soon or not.

The Honda Insight concept took a hushed bow under the lights of Paris today. It’s Prius-esque, but in person the car is less evocative of its Toyota challenger. The Insight’s width and rather low height give it a substantial presence, and there’s a bit of attitude out back with the hatch sliding into a flick of a tail. We imagine some of the more complex elements, such as the headlights reminiscent of shards from Superman’s home planet of Krypton, will not make it to production. We hope the interior, however, is left untouched — it is just the right blend of tech and common currency. The production version will be introduced to the public at the Detroit Auto Show in January and pricing is rumored to be just under $19,000 when it goes on sale.