胡说八道, 不能听

1: 除了brake overheating, there's brake fluid overheating. If the brake fluid is not changed, water may get into it, and when it overheats, water bubble appears in the brake line, then you lose all your braking power. There were a Chrysler minivan crash made to the national headline because of this.

2: Save gas? When you coasting down hill, you worry about how far you can go? Let me tell you, the distance is infinity as long as it's still going down. While going, coasting in gear use 0 gas, coasting in neutral will need gas to keep the engine idling.