Placed under operating conditions very close to their specified limits. Like if you were to drive your car in 2nd gear on the freeway, at 6000rpm. The engine w

Placed under operating conditions very close to their specified limits. Like if you were to drive your car in 2nd gear on the freeway, at 6000rpm. The engine would wear out much quicker than if you drove in 5th gear, at 1500rpm.