Some good information and some reasons to avoid long-term stockpiling of foods with high oil/fat content.
http://www.askaprepper.com/how-to-prevent-your-foods-from-going-rancid/Processed foods and commercial mixes with added fats are a potential problem... You don't know what they really contain nor what their storage life might be. Best to stick with whole foods and plan on eating simple and/or making your own "mixes" on a single batch basis. Learn to cook???
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The article contains good advice (IMO) on how to extend the storage life of oils and fats.
DO NOTE the chart of expected life expectancies. I don't know the source for this charge, so take it with a "grain-of-salt" and be conservative on your own estimates.