1999 Buick Regal Gs Sedan 4-door 3.8l 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.

Little-bit-bigger 2020 Buick Encore GX gets two three-cylinder engines

Ford broke the ice on selling three-cylinder engines in the U.S. with the 2014 Fiesta, then followed up with the EcoSport. Buick is about to widen that supermini-sized crack in the ice with the 2020 Encore GX. The semi-subcompact crossover will come in three trim levels that mix-and-match two turbocharged three-cylinder engines, two transmissions, and two drivetrains. The smaller engine is a 1.2-liter three-pot with 137 horsepower and 166 pound-feet of torque. This comes in one horse and 18 lb-ft of twist beyond the 1.4-liter four-cylinder in the smaller Encore. This engine will only be paired with a CVT and front-wheel drive in the Preferred, Select, and Essence trims. The meatier motor is a 1.3-liter three-cylinder with 155 hp and 174 lb-ft. That's down on the 163 hp and 177 lb-ft that the same engine produces in the Chinese-market version of the Encore GX. However, it gets buyers close to the 1.4-liter turbocharged four-cylinder that used to be optional on the smaller Encore, producing 153 hp and 177 lb-ft. This engine can be optioned on the front-wheel drive Select and Essence trims, where it would be mated to the CVT. The 1.3-liter three-cylinder is standard on all trims optioned with all-wheel drive, where it gets paired with GM's nine-speed automatic. GM does say the horsepower figures are estimates at the moment, so don't be surprised at any slight changes before deliveries begin next year. The Encore GX will serve buyers who would love it if the Encore had a bit more room but don't want to step up to the Envision. For a price GM hasn't announced yet, the Encore GX will reward those buyers with five more feet of cargo space, and some extra power for all those who decide to level up further. The junior Encore weighs just over 3,200 pounds, it's likely the Encore GX will shade that some. The Encore GX does ride on GM's new VSS-F platform, though, so the advanced architecture could provide an overall superior experience even with the lesser three-cylinder. GM has also said that the Encore GX will come standard with safety kit like forward collision alert and lane keep assist with a lane departure warning, features that are cost extras on the Encore. The Encore GX will also include automatic emergency braking, which can't be had on the Encore at any price.