Quote:
Originally Posted by gtc
We recommend a max of 1 year storage for distillate diesel... 6 months or less for biodiesel, especially with higher bio content.
That is also assuming you drain the water and have the fuel tested every three months, which most people don't do at home.
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After 27 days from the time of refining, at 75F oxidation begins at a rate of 1-3% monthly for ULSD. Three different studies were performed on this, FAMEs are far worse.