Cummins Engine Rollout: Day 1

The new X15 efficiency (far left) and X15 performance engine models. The 'four strokes of genius' refers to the Cummins mantra of 'fuel efficiency, performance, uptime, and integration.'

The X12 engine, due to go into production in 2018.

Cummins rolled out a convoy comprised of tractor-trailers and other vehicles along the TRC's 7.5 mile oval track.

The 7.5 mile oval is but one testing area on the grounds of the huge 4,500 acre TRC site.

The 'chase bus' followed the truck convoy at 50 mph on the oval track.

One of the engineering trucks Cummins used to conduct 9 million miles of field tests on its new X15 and X12 engines.

The X15 efficiency engine is "tuned" to boost fuel economy.

Jim Fier, VP of EBU engineering, shows off the 'evolution' of the Cummins medium bore engine line, ending in the new X12 model.

Mario Sanchez-Lara, director of on-highway marketing for Cummins, talked about how the "four strokes of genius' forms the new 'X' logo the OEM is using for its new X15 and X12 engines.