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YouTube viewers prefer BMW

BMW owners sometimes get a bad rap as being snobbish, rude drivers, but according to a new study by the online marketing company ZEFR, Bimmer aficionados also have a close relationship with the brand's vehicles. With well over 4 billion YouTube views, the German automaker is the industry's king of the road online. Making the popularity even sweeter for marketers, 95 percent of those clicks are for fan videos, which represents loads of free advertising. BMW isn't the only automaker with such an extensive following. Honda comes in a close second with around 4 billion views, and Mercedes-Benz is just a little behind it. Among all brands, it's the norm for fan-made videos rather than the official ones to get the lion's share of the clicks, generally 95 percent or more. "YouTube has become a treasure trove for connecting with the right people for automakers," Dave Rosner, ZEFR marketing boss, said to Automotive News. Beyond just a popularity contest among brands, automotive videos are big business on YouTube, according to ZEFR's research. Enthusiasts are leading the way, too. Racing is by far the most-watched category with 895,000 clips generating a staggering 8.2 billion views. Classic cars are also a very hot topic with 305,000 videos getting 1.6 billion clicks. Surprisingly, when it comes to watching auto videos, sedans are most popular on YouTube with over 9 billion views, according to Automotive News. Meanwhile, SUVs, performance vehicles, and pickups were each around 3 billion or less. You can check out the full study for yourself, as a PDF, here. Related Video:

Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

BMW halts delivery of several M cars for rear differential problem

BMW issued a stop-delivery order on 202 cars this week. The affected vehicles include the M2, M3, M4, M5, and 5 and 6 Series models. They were produced between May 12 and July 4, 2016. According to a service bulletin by BMW, which was published on Bimmerpost, the affected vehicles will need a new rear differential. The bulletin doesn't state what's wrong with the rear differentials, and a BMW spokesman did not have immediate comment on the issue. BMW will update the bulletin with more details on warranty information and repair instructions as they become available. Owners can contact BMW to find out if they're affected. BMW has issued several recalls this year. Just last month, the automaker recalled more than 200,000 SUVs for lower child-seat anchor bars, as well as potential damage and failure to the universal join on the front driveshaft. In February, BMW recalled 840,000 vehicles to replace faulty Takata airbags, while 6,110 units of the 2016 7 Series were added to the same recall in April. Related Video: News Source: BimmerpostImage Credit: BMW Recalls BMW Coupe Performance Sedan bmw m4 bmw m2 service bulletin