It has to be some programming on Mitsubishi's part. My experience is that when cruise control is not activated the CVT will only go into the maximum OD ratio of .55 only under the most perfect of conditions. It seems that due to the limited amount of power the Mirage has the ECU doesn't "know" what speed the driver is intending to drive so it won't go into maximum efficiency due to anticipating speed changes which require more rapid throttle response. However when cruise control is engaged the ECU knows exactly what speed the driver intends to go and "knows" that it can aggressively maximize efficiency. This is just theory on my part but there is a huge difference in the way the CVT acts between cruise engaged and cruise disengaged modes.
Originally Posted by XxMetalMartyrxX
View my fuel log 2015 Mirage ES 1.2 automatic: 40.6 mpg (US) ... 17.3 km/L ... 5.8 L/100 km ... 48.8 mpg (Imp)