After Caterpillar stopped building on-highway engines in 2009, the main fight is between Detroit and Cummins when it comes to the best commercial diesel engines on the market currently.

var digg_url = 'https://digg.com/autos/500hp_23_mpg_Audi_R8_V12_TDI_concept_leaked_before_Detroit'; Audi's having a spot of trouble keeping a lid on things ahead of ...

Since launching in 1992 as a replacement for the 6.2 diesel V8, the 6.5-liter GM Detroit diesel engine has had good years and ...

The GMC Crackerbox might be the biggest nostalgia hit for fans of old-school heavy trucks. Everyone who grew up around big rigs seems to have some memory of their dad, grandpa, or uncle driving ...