I had the same issue. I followed the manual's instructions and reset it, but for me, it defaulted to 1 month or 2800km (1,750 miles). I drove to the dealer to ask about resetting it for the recommended interval. They told me that it had to be done on their computer . . . and that any savings I realized on the oil change would be lost after that. I asked if they could just do it next week when I bring my car in for the recall work (airbag). Yes, it could . . . but will still cost $25. I am amazed by that level of gouging. Basically, if I want that feature to work I have to pay $105 per oil change rather than $60 at a good mechanic's shop or $30 to do it myself!
View my fuel log 2014 Mirage SE 1.2 manual: 45.0 mpg (US) ... 19.1 km/L ... 5.2 L/100 km ... 54.1 mpg (Imp)