About 16 months ago, we needed to replace our fuel tank. The tank was drained, and about 40 gallons of oil was dumped into two plastic, covered buckets. We filled the new tank with fresh oil, and my husband put the buckets out in our shed. Here we are, months later, getting ready to move. My niece just purchased a home, and my husband wants to give this oil to her. How do we know if this oil is good? We did have temps below zero over the winter....the oil was not treated with anything prior. Hubby says its fine, but, I want to be sure before I pass it along. Does anyone have any info on fuel oil?