I learned from reading R.C. Clarkes book HASHISH that... because similar to pressed hashish where the gland membrane is ruptured and no longer intact thereby leading to an accelerated oxidation and degradation of the cannabinoids... when making oil the membrane is also stripped/dissolved and lacks that protection against oxidation and degradation that resin powders (dry sifted resin glands), which maintain that glandular membrane, offer.
so, like hand rubbed and pressed hashish, oils should be consumed as soon as possible from the date they were made... if storing is a must... it would probably be ideal to store it in a similar fashion to buds... dark, air tight, cold and moisture free. but still over time it will degrade faster than dry sift or maybe un pressed Ice water extractions (Matt Rize's Ice Wax)
simply put, no, you cannot store oils for extended lengths of time... without oxidation and the THC degrading into CBN