1963 Buick Riviera Base Hardtop 2-door 6.6l on 2040-cars

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Buick really wants us to know the new Cascada convertible won't leak

Quality testing on the factory floor is nothing to joke about. Automakers need to make sure the work being done is up to snuff, and that means some extensive checks. For Buick, that means using a lot of water for each of its Cascada convertibles. Each vehicle that rolls off the floor is subject to a high-pressure, ten-minute soaking that sprays nearly 20 gallons of water from each nozzle during every bath, just to guarantee the fabric roof hasn't sprung any leaks. For some reason, Buick has chosen to show off this testing with the help of what we imagine is the Gorton's Fisherman's baby cousin. Check out the strange testing video, available up top.

The new Buick Regal looks like a Mazda, and we're totally cool with that

Yes, this undisguised Opel Insignia, which will be brought here as the next Buick Regal, looks a lot like a Mazda. You can see it in the grille and headlights, especially – in fact, if you look at one of the photos with tape blocking out the badge in the middle of the winged grille, you might think this is a new Mazda6. The thing is, Mazdas look pretty darn good, so no one's complaining. And when you look at the rest of the car, there's a fair amount of originality going on. Aside from the GM-generic taillights (they look like they could fit on a Chevy, right?) the lines and details are all pretty fresh, and there are some design elements pulled from Buick's gorgeous Avista concept. A sweeping roofline leads to some healthy shoulders at the back, creating a coupe-ish profile with a very abbreviated rear deck. This appears to be a hatchback model and not the four-door sedan, but the general look should carry over. This is definitely a big improvement over the somewhat bulbous current-generation Regal, which also started life out as an Insignia. The car shown here is the Insignia OPC model, with Brembo brakes, big wheels, side skirts, and a front end with big (likely fake) intakes. It will most likely translate to a Regal GS for our market, as is the case with the current OPC and GS. The new Regal/Insignia is expected to use the same platform as the new Buick LaCrosse, which is also shared by the Chevy Malibu and Impala. They should once again be available with front- or all-wheel drive and a choice of turbocharged four-cylinder engines. Rumor has the Opel versions debuting at the Geneva show March, and the Buick would likely follow, possibly in New York in April. View 13 Photos And then there's the wagon. All signs point to Buick finally bringing the most practical Insignia to our market as a Regal. We got wind of a focus group testing the idea, Buick has trademarked the name Regal Tour X. That version would likely go up against the Audi Allroad in the classy, slightly lifted all-wheel-drive wagon category, basically acting as an almost-crossover for people who want a wagon but won't admit it to themselves. The Insignia wagon caught here is also an OPC, and we think it looks even more handsome than the hatch-sedan shown above. The trim piece stretching from the base of the A-pillar all the way up and back down to the tail is a nice touch in profile view, although we're not so sure about how it terminates abruptly at the taillight.

GM's MPG overstatement could affect 2 million vehicles

Late last week, GM admitted that three of its large SUVs fuel economy window stickers did not match their actual efficiency ratings, and so the vehicles couldn't be sold. The stickers on the 2016 Chevy Traverse, GMC Acadia, and Buick Enclave said their ratings were one to two miles per gallon better than they should have been. Officially, the number of affected vehicles sits at about 60,000. But Consumer Reports makes a good point: what's up with all of the previous model year SUVs that are basically the same vehicle? To wit: the 2016 model year vehicles are not substantially different than the 2015 or the 2014, or even going all the way back to 2007. On the EPA's fuel economy website, all of these older models will "have better stated fuel economy numbers than the new vehicles in GM's dealerships," Consumer Reports noted. CR's best point, and the one that makes the 60,000 number potentially grow to 2 million if all of the vehicles built on this platform are affected, is that "[i]t seems unlikely that the company would change the powertrain on these carryover models so late in their model cycles in a way that would cause a dramatic, negative impact on fuel economy." GM says that earlier model year SUVs are not affected and the EPA did not respond to CR's question about the potential for more discrepancies. We've seen automakers reverse course before, so if GM has to come out with a mea culpa soon, don't be surprised. GM is rushing corrected stickers to dealers so that the SUVs can be sold again, but a fix for the already-sold vehicles could be trickier to solve. Related Video: Related Gallery 2013 GMC Acadia View 16 Photos News Source: Consumer Reports Government/Legal Green Buick Chevrolet GMC Fuel Efficiency mpg gmc acadia chevy traverse