I run Redline MTL in my OS and it improved the shifting. I changed it at 30,000 miles and am just about to turn 60,000 miles on the odometer and will change it again. The OEM fluid looked good at the first drain and fill so I'm expecting this next drain and fill to look good also. Then my plan is to change it again at 100,000 miles and every 50,000 miles after that (150, 200 etc..).
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View my fuel log 2015 Mirage ES 1.2 automatic: 40.5 mpg (US) ... 17.2 km/L ... 5.8 L/100 km ... 48.6 mpg (Imp)