I haven't had a sticky caliper yet. The clips that the inner pads ride on seem to get caked in crap causing the pad to not slide back. When I change pads I change the clips, and make sure the caliper bracket is clean and free of rust where the pad rides. And make sure the pins slide free and have are lubed up.
I wouldn't get too mad at the car about having a grooved rotor. I don't think it did it on purpose. Likely cause by a rock getting stuck in the pad, or backing plate?
These cars have tiny brakes, you might get them to last longer by going with the slightly larger 17and newer rotors if you're replacing rotors anyways. You just need 2 caliper mount brackets. Then order 17 rotors. The pads are the same size from 14-19.
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)