Up next MORE THAN JUST HORSEPOWER Published on July 10, 2019 Author Adam Blattenberg Tags best new trucks to buy, chevy 4x4 trucks, diesel 4x4 trucks, Duramax, gm 4x4 trucks, New, new truck review, Share article Facebook 0 Twitter 0 Mail 0 Sippin’ Silverado: 2020 Duramax Gets up to 40mpg Some things are worth the wait. A few weeks after GM reported that the 2020 Chevy Silverado’s Duramax engine was delayed due to emissions certification, the results are finally out. After testing the 3.0L inline-six at the Indianapolis Motor Speedway, GM’s engineers walked away impressed with the engine’s fuel efficiency. According to internal reports, the LM2 Duramax was able to achieve 30-40mpg when traveling at 50-65mph. While it should be noted the mpg rating came from a controlled environment test, it shows the potential of the new Duramax to break the 30mpg barrier — a feat previously unheard of among diesel pickups. A fact that Silverado’s chief engineer Tim Herrick called “extremely impressive”.Subscribe Our Weekly Newsletter This was not a one-time fluke either. At a media event last week, auto journalists were given a chance to flog the engine in a 15-mile closed track. A number of drivers were able to surpass the 40mpg achieved by GM, while others reported getting 30mpg. At present, the Silverado’s closest competitor, Ford’s venerable F-150 gets 22mpg in the city and 30mpg on the highway via its 3.0 Powerstroke diesel, for a combined EPA rating of 25mpg. Part of the Silverado’s better fuel economy is due to improvements in the engine itself. The inline-six is an all-new cleansheet aluminum block that’s 25% lighter than a comparable cast-iron mill. Besides the aluminum block and pistons, the engine’s only iron parts are the crankshaft, connecting rods and cylinder liners. It also uses a new variable intake for optimum engine operation under different loads, as well as a new low-pressure exhaust recirculation system. But GM may not hold the efficiency crown for long. Fiat Chrysler has announced that the Ecodiesel version of the 2020 Ram 1500 will have “class-leading” fuel economy, a statement the General has yet to challenge. But no matter who wins the mpg war, it’s already a victory for us diesel lovers. Stay tuned! Total 0 Shares Share 0 Tweet 0 Pin it 0 Share 0
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