1993 Buick Park Avenue Base Sedan 4-door 3.8l on 2040-cars

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GM claims it's first to sell million 30+ mpg vehicles

As we continue to put together all the data for the year-end edition of By The Numbers, General Motors has announced that it sold more than a million vehicles in the US last year that achieved at least 30 miles per gallon on the highway. More impressively, GM managed this feat using multiple strategies including small vehicle size, turbocharged engines and hybrid or plug-in technologies across four brands (Buick, Cadillac, Chevrolet and GMC) accounting for 13 separate models. This number will grow even more in 2013 thanks to cars like the all-electric Spark, the diesel Cruze, the range-extended Cadillac ELR and the Buick Encore compact CUV.
GM's small car sales were up 39 percent last year helping to attain this million-sales mark for 30-mpg models, and almost 40 percent of all GM sales consisted of cars with fuel-efficient I4 engines. In regards to more advanced means of improving fuel economy, GM says that it plans on having 500,000 vehicles with "some form of electrification" on the road by 2017.
Scroll down for the full list of GM's million 30+ mpg cars as well as an informative press release.

Opel Cascada is Europe's Buick convertible [w/video]

As we reported earlier, there has been much speculation regarding a Buick convertible of sorts. The most ringing endorsement of this conjecture comes today from General Motors Europe, as the new Opel Cascada has debuted on the interwebs. Opel calls the four-passenger Cascada an "athletic, glamorous midsize convertible." With a length of 4,697mm (185 in.), the Cascada is as long as an Audi A5, to which GM has said it would be slightly larger.
The Cascada, which is Spanish for waterfall, features a cloth convertible top that retracts in 17 seconds and at speeds up to 50 km/h (31 mph). The Cascada features a 1.4-liter turbo gas engine, 2.0-liter turbodiesel with 165 horsepower and a range-topping 1.6-liter turbocharged Ecotec engine that puts out 170 horsepower and 280 Nm (207 lb-ft). Power is sent through either a six-speed manual or six-speed automatic transmission.
According to GM, the Cascada will also come rife with luxury and tech features. In addition to adaptive forward lighting and ergonomic heated front seats, the convertible will feature Opel Eye, which is a front camera that can recognize traffic signs and incorporates lane departure warning and forward collision alert.

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.