2015 Volvo Truck VNL64T780

The Volvo D13 is an in-line 6-cylinder, 12.8-liter, diesel engine using a high-pressure unit injector system, overhead camshaft, and a twin-entry turbo using a water-cooled exhaust manifold. This contributes to world-class fuel efficiency and excellent operating economy, combined with very low emissions.

Not only does D13 engine boast power but fuel efficiency as well. With the full weight of 2605 the D13 is the most efficient engine in its class saving money and hauling loads much more profitable.The XE13 (exceptional efficiency) package allows the truck to operate in a lower rpm range at a given vehicle speed, typically turning 200 rpm slower. Customer data has indicated trucks with the XE13 package consistently operate in the engine’s sweet spot of 1,050 to 1,500 rpm, with up to 70% of their operation in the most efficient range of 1,100-1,200 rpm.