On Mon, 07 Nov 2016 20:17:52 -0500, wrote:

On Mon, 07 Nov 2016 19:24:00 -0500, wrote:

On Mon, 7 Nov 2016 14:27:00 -0800 (PST), wrote:

I have access to #2 fuel oil that has been sitting in a tank for a couple of years. Can I use it in my oil burner/furnace? Will it burn properly? Do I have to filter it?
Thanks,
Tony

#2 (diesel or fuel oil) can grow a fungus if it does not carry the
right additive package.
Algi - not fungus.

Some kind of living stuff that plugs filters.
It is common in boats. I assume any warm humid place would do it tho.