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GM exploring ways to raise half-ton Duramax diesel tow rating

Lots of truck owners cheered when GM announced fuel economy numbers for the 2020 Chevrolet Silverado with the 3.0-liter Duramax diesel inline-six. Even after Ram let loose its EPA mileage ratings for the 2020 Ram 1500 EcoDiesel, the Chevy oil-burner still took the trophy. The victory was years in the making, GM engineers spending an entire four-year development cycle refining the LM2 Duramax to increase mileage. The tradeoff, as well all know by now, is towing; the Duramax in half-ton duty pulls a maximum 9,300 pounds in the Silverado. Rivals across town can do more, the Ford F-150 PowerStroke rated at 11,500, the Ram 1500 EcoDiesel game to pull 12,560. GM engineer John Barta told Muscle Cars & Trucks that more hauling chops could be on the way, explaining, "We’re actually looking at upgrading some of the materials around (the engine bay) to see if we can maybe raise our tow rating." Engine bay materials are at issue due to thermal complexities underhood. John Barta, GM's assistant chief engineer of diesel engine controls, said the Duramax's inline-six configuration allowed engineers to get emissions hardware like the combined selective catalytic reduction, diesel oxidation catalysts, and diesel particulate filter unit closer to the engine, where it heats up quicker, getting emissions down quicker. But that filter puts another heat source in those confines, enforcing a cap on the tow rating to keep the engine and other systems from overheating. "If you look under the hood," he said, "youÂ’ll see a significant amount of silver ‘moon tapeÂ’ around to make sure things arenÂ’t getting overheatedÂ… if we were to go up in higher towing, which we can, we start impacting the possibility of deteriorating some of the components.” There isn't much space for more grille, so swapping for a better grade of "moon tape" or a different kind of material could reduce engine bay heat, extracting a higher tow rating in the process.  It's important to note a point Barta's been making for months about the Duramax figures, though. "Even though itÂ’s nice to brag about big numbers, in reality, light duty customers are not towing that large with their trucks," and, "We do know that (95 percent) of our light duty customers donÂ’t tow over 9,000 pounds." On our First Drive of the 2020 Silverado diesel we called out the tow rating, but emphasized that the Chevy and GMC have more important challenges to overcome.

Driving McLaren's Sports Car and 'The Best Corvette' at the M1 Concourse | AutoblogVR

There's nothing better than a track day. Great cars on a great track are always great fun. Recently, we had the opportunity to check out the new M1 Concourse in Pontiac, MI, with two of the coolest cars in the game; a McLaren 570S and a Corvette Grand Sport. Driving the 570S was Autoblog senior editor Greg Migliore, and he didn't hold back. Getting behind the wheel of the McLaren, Greg explains that although this is McLaren's idea of a sports car, "it's all relative." Topping out at 204 miles per hour with 562 horsepower, there's no two ways about it: this thing is a monster. While the 570S was fantastic, we had another sports car we wanted to drive and editor-in-chief Mike Austin was just the man for the job. Enter the Corvette Grand Sport. Mike pushed all 460 horses of the 'Vette to the limit and came away impressed with the car, even calling it "the best Corvette." Comparing it to its more powerful sibling, the Z06, Mike goes so far as to say the Z06 has too much power, while the Grand Sport seems to be the third bear's bowl of porridge in the Corvette family... It's just right. We captured all the action of the day with 360° cameras so you can feel like you're right there in the car sitting shotgun with us! You can check out the McLaren and Corvette laps above, but the best way to view them is through the AutoblogVR app, where you can watch the videos on your VR headset or in a nice swivel-y office chair so you can take in the sights all around you. Each month, new episodes will launch on the AutoblogVR App. We'll be posting them here on Autoblog, but for the best experience, head over to the app, which you can download for free from the App store and Google Play. Be sure to try it with a cardboard viewer, too!

Coronavirus blues, and the 2021 Hyundai Elantra debuts | Autoblog Podcast #619

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor, Green, John Beltz Snyder and News Editor Joel Stocksdale. Get a behind-the-scenes look at life for Autobloggers during the coronavirus outbreak, as they talk about how it's not only affecting the automotive industry at large, but the people who cover it as well. Amidst the chaos, Hyundai unveiled the 2021 Elantra, and out editors opine about the new small sedan. They briefly discuss what cars they'd want to drive cross-country if they had a flight that had been canceled, before talking about the cars they've actually been driving, including the Mercedes-Benz GLS 580, Jeep Renegade and Lincoln Corsair. Finally, they reach into the mailbag and help a listener pick a new car. Autoblog Podcast #619 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown The coronavirus is affecting the auto industry, and those who obsessively cover it 2021 Hyundai Elantra has been revealed Poll: Your flight's canceled. What car do you drive cross-country? 2020 Chevy Corvette orders end Cars we're driving: 2020 Mercedes-Benz GLS 580 2020 Jeep Renegade 2020 Lincoln Corsair Spend My Money Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: