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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 the Toyota Tacoma, BMW 430i and Chevy Corvette Convertible | Autoblog Podcast #671

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by West Coast Editor James Riswick and Road Test Editor Zac Palmer. First, they talk about driving the Toyota Tacoma TRD Off-Road (equipped with a TRD Lift Kit), Mini Cooper S Hardtop 2-Dor, BMW 430i xDrive, Chevy Corvette Convertible and Chevy Suburban with the Duramax diesel engine. They discuss the news, including Toyota's desire to differentiate the 86 from the BRZ, the new Jeep Magneto concept and Greg's opinion piece on why Stellantis needs Chrysler. Last, but not least, they dig into the mailbag to help a listener figure out how to replace their Honda S2000 and Honda Fit. Autoblog Podcast #671 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 Cars We're Driving 2021 Toyota Tacoma TRD Off-Road 2021 Mini Cooper S Hardtop 2 Door 2021 BMW 430i xDrive 2021 Chevy Corvette Convertible 2021 Chevy Suburban Duramax diesel News Toyota 86 reportedly delayed to differentiate it from Subaru BRZ Jeep Magneto: Electrifying the Easter Jeep Safari with a Wrangler EV Why Stellantis needs Chrysler Spend My Money Feedback Email – Podcast@Autoblog.com Review the show on iTunes Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related Video: Podcasts BMW Chevrolet Chrysler GM MINI Toyota Truck Coupe SUV Diesel Vehicles Luxury Off-Road Vehicles Performance

More than half of Mazdas sold in 2018 are CX-5s, and other interesting sales facts

Last year was a seriously good year for carmakers. Overall, more vehicles were sold than in 2017, and the total number wasn't far off of the all-time record in 2016. Digging deeper into the numbers, you'll find some pretty usual stuff including the Ford F-Series still being the bestselling pickup truck in America, and a continued trend toward crossovers. But there are also some oddball factoids tucked in these sales reports, some that defy the trends, and some that are extremes of the public's buying preferences. We've compiled several interesting tidbits from last year's sales right here for your enjoyment. More than half of Mazda's sales were of CX-5s Yes, over half of all Mazda sales were of this one model. The company sold 300,325 cars in America last year, and 150,622 of them were CX-5 crossovers, or 50.1 percent. Just for emphasis, that means the other 49.8 percent of Mazda's sales were split among five other models, the Miata, 3, 6, CX-3 and CX-9. Breaking that down further, the second-best seller was the Mazda3 at 64,638, which isn't even half of the CX-5's sales. People are crazy for Mazda's middle crossover. Volkswagen actually sold more cars than crossovers It's clear that the crossover is the future king of car sales. For most mainstream brands, it already is. Chevy, Ford, Honda, Toyota, Subaru, Mazda and Nissan all sold more crossovers and SUVs than they did conventional sedans and hatchbacks. There are holdouts, though, and one of them is Volkswagen. At the end of 2018, the company sold 189,343 cars and 164,721 crossovers in the U.S. So that's one win for the classic car set, and it's justification for VW to maintain its car line for the foreseeable future. It's a bit of a hollow victory, though. Look closer and you'll see that car sales were down 28 percent from 2017, when VW sold 262,029 cars. Crossovers, on the other hand, jumped 112 percent from 2017 when 77,647 crossovers moved through U.S. dealers. So expect the tables to turn very soon. Mustang is still the muscle-car sales king, but Challenger is the only one to improve Once again, the Ford Mustang topped the muscle-car sales charts, beating out the Dodge Challenger and Chevy Camaro. Ford moved 75,842 of the ponies in 2018, while Dodge sold 66,716 Challengers for second place, and Chevy sold 50,963 Camaros to bring up the rear.