Hi, I'm new to this site so hopefully I did this right. I bought a 2012 Cruze 1.8L ecotec and it has 56,500 miles on it(absolutely love it) it's a manual transmission. When I start it in the morning, it cranks right up perfectly fine. But throughout the day, it rattles and makes a horrid sluggish/Stutter noise each time I crank it after the morning(but not every single time, which is weird). I've taken it back to Carmax(where I purchased it) and they took it to a Chevy dealership since it's still under warranty. Since then they've replaced: the starter, fusebox, driveshaft, taken apart the transmission and tightened the flywheel, put on another starter just in case it was faulty. It's been there for 3 weeks now and I don't know if I should just get over the noise(since it's not every time I crank it) or get another car. I have been to 3 places for this issue, one person said check the motor mounts, they said it was fine when I got them looked at, one person said it was just cause it's stickshift, and the dealership was my last resort, and it's still doing it after all they've replaced. I really want to know if I should just learn to get over it, I read on here that someone said theirs did it too and how a dealer said it was fine. If it's not gonna hurt it or anything I will just keep it. I also read that the oil might have been too thin, but I just really want to know if I should get it out of the shop and get over the noise, or if it's actually a serious issue, bought it used and the dealer said it was great(but they want me to buy it so obviously they said anything) thank you in advance!