The new Cat® 349E hydraulic excavator features a 396 net horsepower Cat C13 ACERTTM engine that meets US EPA Tier 4 Interim emissions standards. The new 349E delivers more engine and hydraulic horsepower than its 345D predecessor while consistently averaging five per cent improved fuel efficiency in typical applications. The 349E's Cat C13 engine, which operates either on ultra-low-sulfur diesel fuel (ULSD) or a blend of ULSD and 20 percent biodiesel (meeting ASTM 6751 or EN 14214), uses the Cat Clean Emissions Module (CEM) to meet stringent Tier- 4 Interim standards. The CEM regeneration system is designed to be transparent to the operator and regenerate when the conditions are optimal with no operator intervention. In automatic mode, the Cat Regeneration System allows the machine to work as normal with no interruptions to the work cycle. The system automatically senses when to regenerate during idle and while the machine is working to maintain high production. The system's manual mode allows the operator to override the automatic setting. Among the 349E's several new fuel-saving features is the Engine Idle Shutdown Setting, which allows selecting how long the machine is permitted to idle before shutting down.