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BMW reveals M4 safety car with innovating water injection system [w/video]

Racing series don't just pick their safety cars at random, or use just whatever car is lying around. These days the car that sets the pace at the front of the pack is typically provided through consideration by a sponsor. In the MotoGP series, that's BMW and its M division, which have served up the Official Car of MotoGP since 1999. What you're looking at is the latest, and it packs some innovative technology on board. Aside from the matte black wrap with BMW's iconic striped livery, upgraded aero kit, retrofitted interior and emergency equipment, this BMW M4 coupe packs a new injection system under the hood. Only instead of injecting fuel, it injects water into the combustion chamber – something that wouldn't usually be recommended, but BMW insists actually aids in the combustion process. The idea is that the temperature of the air being mixed with the fuel inside the engine is usually hotter than ideal, so the system injects a fine mist of water into the collector in order to reduce the air's temperature... sort of like one of those hydrating misters at an amusement park or outdoor mall, but in an even hotter environment. The system brings the temperature of the air down to a more optimal temperature, helping it combust better. The process is said to yield a number of positive effects. For one, it reduces knocking. For another, it can make more out of lower-octane fuel where higher octane isn't available. It also can control the adverse effects of higher ambient temperature on the combustion process. But most of all, it increases output and reduce fuel consumption by around eight percent. Whether that eight percent is worth the added weight of the system – particularly with water pump and a 1.3-gallon tank in the trunk – is up for debate. But we'd imagine that the Bavarian engineers have weighed very carefully. Of course there's also the matter of refilling the water tank, which BMW says would be carried out whenever the safety car is refueled, but in real-world conditions would only necessitate attention once every five top-ups at the gas station. By now you might have guessed that BMW probably didn't develop this system just for the MotoGP safety car, and isn't planning on keeping it confined to the racetrack. Instead it's being tested and demonstrated on the safety car before being rolled out on production models in the future.

2014 BMW M6 Gran Coupe

One of the many perks of this job is, not surprisingly, the cars. It's relatively easy to snag the keys to a vehicle for a special occasion, whether that be for a road trip, tailgating or helping a friend move. And while sometimes the tailgating might happen with a Ford F-150 instead of a Range Rover and the road trip might be in a minivan rather than a Mercedes-Benz S-Class, occasionally the stars align and a special vehicle arrives for an equally special time.
That's exactly how I found myself dressed to the nines and behind the wheel of the BMW M6 Gran Coupe, a $135,375 (as-tested) rocket ship, en route to a rare multi-wedding weekend to celebrate with two pairs of my closest friends on the biggest day of their lives (a very special congratulations to Kara and Zach, and Laura and Andrew). Continuing with our nuptial theme, the M mechanicals and the 6 Series Gran Coupe body are a match made in heaven.

Audi tops BMW and Mercedes in luxury sales

April was a good month for Audi, as the four-ring automaker beat out both Mercedes-Benz and BMW in sales. Bloomberg reports that it was America's appetite for CUVs like the Q5 and ancient Q7 that helped Audi move nearly 153,000 units around the globe. It's not all good news, though. Audi's worldwide sales only jumped by 2.5 percent, compared to BMW and Mercedes, whose sales increased 5.6 and 11 percent, respectively. On top of that, BMW is still the best-selling brand (of the three, anyway) so far in 2015, outselling Audi by roughly 9,000 units and Mercedes by about 23,000 vehicles. Considering the faster growth of its rivals, it's unclear if Audi will be able to hang onto the monthly sales crown beyond April, or if BMW will continue its reign as the world's biggest luxury automaker.