My wife's 2013 Elantra GT with the 1.8 liter NU engine galled up the piston skirts at 14,000 miles. Yes, 14,000 miles and it was ran on Super Tech full synthetic and Mobil 1. Oil changed every 3,000 miles, or less as she was a mega short tripper at 2 miles to work and back. The mechanic said...