The High Efficiency Motor.

High efficiency motors can reduce energy consumption by as much as 45% in comparison to standard motors. Look for seals of approval designating your motor's power savings abilities to take another step in Greenifying the planet. (One of the mixer motors we use below; not only does it make money, but it saves money too).
Did you know:
Installing electric motors having the highest electrical energy efficiency commensurate with your needs. Energy-efficient can save you money by reducing your energy costs.

In addition, you will be reducing your dependence on power generated by power plants. So remember to calculate not just initial costs, but also costs over time are what you should look at when buying a new motor. The planet and future generations will thank you.