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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.

2019 Toyota Avalon vs. full-size sedans: How they compare on paper

Full-size sedans aren't exactly in great demand at the moment, and at least one of the vehicles in this comparison has been rumored to be on the endangered species list. Yet, we've just had our first drive in the 2019 Toyota Avalon, and if anything has a chance of rejuvenating the segment a bit, it's an all-new version of what has long been the segment's benchmark. To see how the new Avalon compares, we've put together the below spreadsheet featuring the Avalon's primary apples-to-apples rivals, the Buick LaCrosse and Chevy Impala. We also included the Nissan Maxima, which is comparable in price, sales and non-luxury badge, and which offers the sort of increased driver engagement promised by the new Avalon XSE and Touring trim levels. We also included the outgoing Avalon for reference as well as that car's luxury cousin, the Lexus ES, which can definitely be cross-shopped with the luxuriously trimmed Avalon Limited. You can use our Compare Cars tool to create your own comparison, such as one featuring the rear-wheel-drive Chrysler 300, Dodge Charger or even Kia Stinger. Alright, enough chit chat. On to the spreadsheet. Performance and fuel economy The GM sedans may come standard with four cylinders, including a mild hybrid system in the LaCrosse, but puh-lease. The V6 is the name of the game in this segment, with outputs now surpassing the 300-horsepower mark. The LaCrosse is the horsepower and torque champ, though it also weighs a bit more than the new 2019 Avalon, so acceleration is likely to be comparable. The Impala weighs a lot more and has only a six-speed automatic, so despite having a wee bit more power, one should expect it to be pokier (not a good sign for a car rumored to be on the chopping block). One would expect the Maxima's 300 hp and lowest curb weight to result in the quickest acceleration, but then it's also strapped to a CVT, which despite being better than ever, is still a CVT. Things get worse for Chevy when you consider the Impala's base four-cylinder gets the same 25 mpg combined as the Avalon's V6 — once again a segment best. Now, should you really prioritize fuel economy, the 2019 Toyota Avalon Hybrid really stands out with a 43 mpg rating (or 44 with the base XLE trim) that bests the outgoing Avalon Hybrid. Honestly, after driving this new Hybrid, it actually seems like it would be the best bet for most buyers. There's sufficient power, and it only costs $1,000 more than the comparable V6 version.

Buick Regal, Hyundai Sonata

Toyota is ramping up production of an all-new 2018 Camry and spending over $1 billion – with a "b" – at its Georgetown, Ky., plant. That investment speaks to the popularity of midsize sedans, despite sales inroads made by crossovers. While Accord and Camry are givens in the segment, less attention is paid to Buick's Regal and Hyundai's Sonata. And if shopping for a midsize sedan with a $30,000 budget, you should pay attention. Both offer a compelling combination of attributes and can be well equipped for that price point. Finally, both are due for either a major redesign (Regal) or aggressive freshening (Sonata) in the 2018 model year. Both Buick and Hyundai will be offering incentives 2017s, but Hyundai's program is more aggressive, with up to $6,000 in savings (as this is written). BUICK REGAL: For those seeking exclusivity at well below an "exclusive" price, there is the Regal. Designed by GM's Opel as the Insignia, the version sold stateside keeps most of its Eurocentric nature. It doesn't pretend to be an Audi or BMW, but it provides something more German than Volkswagen's Germany-by-way-of-Tennessee Passat. A Regal, in all-wheel-drive 'Regal' trim, supplies you with a turbocharged 2.0 liter and 6-speed automatic transmission. Its 259 horsepower and 295 pound-feet of torque propel the 3,600-pound Regal with authority and respectable efficiency. Despite its relatively low curb weight, the Regal feels substantial, with a heavy feel behind the wheel and a quiet authority going down the road. Inside, you'll find an interesting mix of Old World and New Detroit, with informative gauges, a center stack that dominates the instrument panel, supportive buckets up front and a reasonably spacious rear seat. The Regal's interior volume is respectable (97 cubic feet inside, while the trunk has 14 cubic feet), but this remains a better environment for young families or empty nesters. Those with a lot of kids or stuff should shop Buick's about-to-be-redesigned Enclave or midsize Envision. For the 2017 model year, Apple CarPlay and Android Auto have been added. The Driver Confidence 1 package (optional) includes Forward Collision Alert, Lane Departure Warning, Lane Change Alert, Side Blind Zone Alert, Rear Cross-Traffic Alert, Following Distance Indicator and memory seats. Driver Confidence 2 has Collision Preparation with Collision Mitigation Braking and Full Speed Range Adaptive Cruise Control. It's all good stuff.