Once upon a time I had a username here but can't remember what it was. I previously owned a 2009 V6 Malibu that blew a connecting rod at about 79000 miles GM replaced the engine under warranty. The car had some moderate transmission problems slipping and hard shifts following the repair so I decided to trade it in for a 2015 2.0T LTZ. I really liked this car. It felt more responsive than the old V6 and drove really nice. It really seemed like a great car... even though a 4 banger i felt it had more power at a wider range than the old V6. Beside the point though, this car has met with a similar fate. Last week I accelerated from a stop and about 1 or 2 seconds into ramp up around 25 mph it made a bang. The engine light was blinking and a couple other lights were on. I had no power and rolled to the side of the road and powered off. Two days later I am told #1 piston has cracked and made deep scoring in the cylinder meaning the engine needs to be replaced. This time my warranty claim was denied at 55,000 miles because two oil changes ago I was 700 miles late on the change - 8200 miles instead of 7500. I was using full synthetic but it was my fault for not getting it on time. The change after was on time and this change was only 2300 miles old. I escalated the issue and received another denial. The replacement cost is $6400. Lesson for anyone running over on those changes... do it once, even 10000 miles before the issue... they got you forever. Don't. I also have learned GM powertrains are not what they used to be. V6 blew apart, 2.0T blew apart, not a great testimonial. Now I search this forum and see a dozen reports of the pistons failing on the newer 2.0 and 1.5 engines. What is going on here?