Once the 12.7-liter Series 60 was discontinued, the 14-liter Series 60 replaced it. In 2007 the 12.7-liter Detroit Diesel Series 60 was discontinued. The 12.7L engine was favored in buses for its better fuel consumption. In 2004 the 14-Liter engine became the dominant platform in Freightliner over the road sleeper trucks and changed the ECM to a DDEC V. In 2001 the bore and stroke increased and the engine displacement rose to 14 L (854 cu in), with an increase in power output to 575 hp (429 kW) and a torque increase to 1,850 lb⋅ft (2,508 N⋅m). Detroit Diesel began making Series 60 marine engines in 1999, with wider availability starting in 2000. Starting in the late 1990s, Neoplan made the Series 60 as an available engine for their high-floor and low-floor articulated buses - the AN460A and AN460LF. Once the 11.1-liter Series 60 was discontinued, the 12.7-liter Detroit Diesel Series 60 became the motorcoach application. In 1998, the 11.1-liter Detroit Diesel Series 60 was discontinued. Both engine sizes were also used in truck and tractor-trailer applications. The Series 60 was also available in 12.7 L (775 cu in) at the time, which was created by a longer stroke of 6.3 in (160 mm). In 1993, the 11.1 L (677 cu in) version was rated at 350 bhp (261 kW) (but would produce 15 more if the cruise control was engaged). Detroit Diesel prescribed overhaul intervals of 500,000 miles (800,000 km), then raised that to 750,000 miles (1,210,000 km) after more experience was gained with the new engine. When it was introduced in 1987, the Series 60 was the first heavy-duty diesel engine with fully integrated electronic controls. In 1993, it was popular on many USA buses in the 11.1 L (677 cu in) displacement. At that time, it differed from most on-highway engines by using an overhead camshaft and " drive by wire" electronic control. The Detroit Diesel Series 60 is an inline-six 4 stroke diesel engine produced from 1987 to 2011.
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