#ColoradoDiesel

Until an automaker comes along with something better, your cheapest bet for highway fuel economy in a pickup is the Duramax diesel-powered Chevrolet Colorado and its GMC Canyon twin. The full-size Ford F-150 with 3.0-liter diesel V6 matches it in economy, but not price.

Boasting a 30 mpg EPA rating for highway consumption, the oil-burning midsizers command a premium over their lesser siblings, but make up for it with thriftiness and heaps of torque. The 2.8-liter inline-four generates 369 lb-ft of twist — far more grunt than the 275 lb-ft on offer from GM’s 3.6-liter V6.

However, there’s a mystery afoot. The EPA ratings for the newest Colorado and Canyon diesels show a drop in city and combined efficiency for the 2019 model year, despite the powertrains being a carry-over.