1966 Buick Riviera Base Hardtop 2-door 7.0l on 2040-cars

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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

Next Opel Insignia to adopt sleeker looks

The very first set of spy photos of the next-generation Opel Insignia have dropped, giving us a look at the more svelte, aggressive, and stylish look of the popular sedan. As a reminder, the Insignia is sold here in the United States as the Buick Regal. There's only so much we can discern from these photos, thanks to the very heavy camouflage. But we can get a look at the new Audi A7-like roofline, which our spies citing similarities to the Opel Monza concept car from the 2013 Frankfurt Motor Show. The Monza link fits with our previous reports, which claimed the gullwinged wagon would serve as a prime source of inspiration for both the Insignia and US-market Regal. Aside from the significantly redesigned sheetmetal, Opel is also increasing the size of its flagship sedan, adding nearly four inches between the axles. According to our spies, the goal is to build a vehicle comparable in size to the Skoda Superb, a roughly Volkswagen Passat-sized sedan based on the VW Group's MQB platform. What's most interesting for US customers, though, is the body style shown here. Like the aforementioned A7, the next Insignia will be offered as a five-door model, rather than a traditional sedan. The five-door hatch would later be joined by a traditional wagon. It's unclear whether the US market Buick will take a similar route, or whether General Motors will demand a four-door variant exclusive to North America. Check out the spy photos above, and keep an eye open for more on the next Insignia/Regal. Don't plan on seeing it at an auto show any time soon, though. It's not slated to debut until the 2017 Frankfurt Motor Show.

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.