On Sun, 15 Jan 2012 17:07:14 -0500,
(---MIKE---) wrote:

My furnace service man recommends adding conditioner to prevent sludge
and absorb moisture. This is similar to adding stabil to gasoline.

---MIKE---

In the White Mountains of New Hampshire
(44� 15' N - Elevation 1580')


Gold Eagle brands, makers of Stabil, also makes HEET for fuel oil.

Another is Aronol and probably another dozen brands.
http://www.aronol.com/arotec_prods.html