Diesel engines like the 3.0L Duramax require special maintenance, including the use of DEF, or Diesel Exhaust Fluid. Now, GM ...

With nearly 40 years in the music business, British rockers Def Leppard know a thing or two about what makes a band stay united. "We can turn it on and off. We’ve always said, ‘Leave your ego in the ...

Def Leppard solidified their place in the rock-legend pantheon with Hysteria, a diamond-selling behemoth that functioned as a veritable greatest-hits set. The album spun off Top 10 hit after Top 10 ...

Before Def Leppard sold 25 million copies of Hysteria, even before Pyromania sold 10 million, they sold next to nothing of an album many devoted fans consider their very best: High 'n' Dry. It didn't ...

Forbes contributors publish independent expert analyses and insights. Hugh McIntyre covers music, with a focus on the global charts. Def Leppard has outlived so many of the hard rock and heavy metal ...

DEF is a key component in lowering pollutants emitted from diesel engines, helping to reduce harmful emissions. Long-haul truckers and diesel engine enthusiasts had to rethink their entire operations ...

Forbes contributors publish independent expert analyses and insights. Hugh McIntyre covers music, with a focus on the global charts. Just a few days ago, Def Leppard released “Just Like 73 (Tom ...

Under certain conditions, the water in DEF can evaporate, leaving behind white crystal urea deposits. Over time, these crystals can build up, clogging system components and interfering with normal ...

In 2007, as many truck and engine makers started announcing they would use selective catalytic reduction to meet 2010 federal emissions regulations, a new term entered our trucking dictionary: diesel ...

Diesel, once a bastion of the future and a savior of fuel economy, has found itself in a very different place since the industry-shaking Diesel Gate incident of 2015. It went from what was seen as the ...