What does the HI-TEMP WASH option do and when should I use it?

When HI-TEMP WASH is selected, the dishwasher heats water in the main wash to approximately 140°F (60°C), which helps detergent remove food grease and soil more effectively and also aids in drying. This option can be used with all cycles except RINSE ONLY, and it is automatically provided when the HEAVY WASH cycle is selected. (Page 7)