What storage tips make margarine last longer?

Here are the experts’ tips:
 
 

• Buy an amount that you’ll use within a month, the shelf life of an opened container.
• Get margarine home and into the refrigerator quickly.
• Once open, margarine should be stored in an airtight container in the butter compartment of a 40°F (or lower) refrigerator.
• Margarine absorbs other food odors, so keep it away from onions and garlic.

Source(s):
Assistant Professor Franco Milani, Department of Food Science, University of Wisconsin
 
Cleveland Clinic