1993 Buick Century Custom Sedan 4-door 3.3l on 2040-cars

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Buick Avenir concept struts into Motown

We love auto show surprises, and Buick has already gifted us a sparkly package on the eve of the 2015 Detroit Auto Show. Dubbed Avenir, this four-door concept is said to signal the future of the Trishield brand by previewing a possible flagship sedan. Incorporating time-honored Buick design hallmarks like the sweep-spear profile, Ventiports, and even a subtle boattail rear-end, the four-place sedan is powered by a surprisingly real-world powertrain – namely a next-generation V6 with cylinder deactivation and stop/start, with the most interesting part of the driveline arguably being a "twin-clutch all-wheel-drive system" and a nine-speed automatic gearbox with paddle shifters. Make no mistake, this is a big car. At 204.5 inches long, it's longer than a standard-wheelbase Cadillac Escalade – a span that's emphasized by the car's long hood and waterfall grille – though it's not quite as wide. While clearly a showcar, the beautifully crafted interior looks largely produceable, including attributes like a next-generation 12-inch touchscreen infotainment system and 4G LTE wifi, but we suspect a production car would pick up a third rear seatbelt and give away some of its flowing contours that are said to have been "inspired by nature and sea waves receding on a beach." No word yet on whether there's actually a showroom future for a car like this – it could simply be an exercise designed to test the waters for a next-generation LaCrosse. After all, sedans aren't exactly popular concept fodder these days, especially as crossovers continue to eat into traditional sedan sales in many of the world's markets. However, China still loves the coddling rear seats of a proper four-door sedan (which in this case include silk and bamboo elements), and with a majority of Buick sales happening in the People's Republic, the Asian nation controls the destiny of this General Motors brand. Said another way? Anything is possible, especially with General Motors known to be working on a large flagship sedan for Cadillac already – the Avenir is reportedly based on the same Omega architecture that will underpin the forthcoming CT6. What do you think? Is this a promising direction for the resurgent Buick? Scroll through our gallery, check out the video, and then have your say in Comments.

GM warning 800,000 owners that their cars may need oil changes more frequently than they say

The days of changing your engine oil every 3,000 miles are long gone thanks to most cars having automatic oil monitoring systems, but about 800,000 General Motors vehicles apparently have incorrect monitoring software that is leading to premature engine component wear. According to Autoweek, certain 2010-2012 Buick LaCrosse, Regal, Chevrolet Equinox and GMC Terrain models equipped with 2.4-liter four-cylinder engines could be going too long in between oil changes resulting in a higher-than-normal number of warranty claims for the engine's balance chain. The balance chain links the balance shaft to the crankshaft, and a worn one can produce higher noise levels.
As a fix, GM dealers will be reprogramming the software for the monitors in an effort to reduce the interval between oil changes, which varies based on driving habits and conditions. Through February 2015, the software update will be done at no cost to vehicle owners, but since this is not a recall, after that point, it will be up to the discretion of dealers as to whether or not they will charge for the service. What isn't immediately clear is whether GM plans on giving assistance to out-of-warranty customers who are experiencing engine issues from the worn chain.

Buick tops in Consumer Reports' annual brand rankings

Buick is the first US-based automotive brand to crack the top 10 in Consumer Reports magazine's annual brand report cards. US automakers also placed three vehicles on the magazine's list of "top picks" for vehicles, the first time that's happened in 17 years. The rankings were unveiled Tuesday in the magazine's annual auto issue. Buick placed seventh in the brand rankings. But the brand rankings and top picks still were dominated by Japanese and German manufacturers, with Lexus, Mazda, Toyota, Audi and Subaru taking the top five brand spots. The magazine calculates each brand's overall score with a composite of its vehicles' road-test scores and reliability scores for each model in its annual survey of subscribers. It's the third year for the brand rankings. Porsche placed just ahead of Buick at number six, while Honda, Kia and BMW rounded out the top 10 brands. Mercedes-Benz, Acura and Infiniti all suffered precipitous declines in their rankings due to unreliable new models or poor road test scores. Mercedes fell out of the top 10 to 21st, while Acura dropped from number two to 11 with an unimpressive test of the new RLX sedan, the magazine said. In the model rankings, the top overall finisher was California-based Tesla's Model S electric car, for the second year in a row. The Model S, which cost the magazine $89,650, finished first due to its performance and technical innovations, the magazine said. Buick's Regal midsize car beat the BMW 328i as the top sports sedan, and the Chevrolet Impala was named the top large car. The model rankings show Consumer Reports' favorite among the 270 vehicles its team has recently tested. The rankings are closely watched in the auto industry, since shoppers consistently cite Consumer Reports as a main source of car-buying advice. Other top picks included the Subaru Impreza in the compact car category, Subaru Legacy in midsize cars, Toyota Prius as the best green car, Audi A6 luxury car, Subaru Forester small SUV, Toyota Highlander midsize SUV and the Honda Odyssey minivan. Japanese vehicles won six of 10 top pick categories, but that was the smallest number in the 19-year history of Consumer Reports top picks. "For years domestic automakers built lower-priced and lower-quality alternatives to imports, but those days are behind us," said Jake Fisher, the magazine's director of automotive testing. But other U.S.-based automakers still had problems.