Strange problem, but it seems that it was reproduced by another car other than mine, so I would expect that it will happen to a lot of others as well. There’s an intermittent problem where car will just rev and not move very quickly as if it doesn’t get into gear or something. It won’t go past 60mph or so and it’s revved very high at that speed, so you’re wasting a ton of gas. If you stop and restart the car, it’ll run fine again. It’s really frustrating as you don’t know when you’ll run into this problem and when you won’t. It will get worse and worse as time goes on. Turns out, the problem is with the battery. If you just change the battery, it’ll run just fine again! Just $50 fixes the problem!