I have acquired a "forgotten" collection of canned food - fruits, vegetables, soups that are not marked with a "best by" date. Some may be years old, and some may be more recent - months to a year or two. I have discarded any that were bulging. I know that many of the cans have code numbers that I could investigate, but there are too many of them to try and track down. Are there any knowledgable opinions out there as to whether, if they are not bulging, the contents would be safe to eat? Another factor is that some may have been stored in a garage, subject to variations in temperature. Would that affect the contents as well?