"S. Barker" wrote:
heating oil IS #1 diesel.

Not necessarily. Sometimes it's #2 diesel. Sometimes
it's a mix of the two. And sometimes it's #2 with
additives to keep it from getting thick a colder temps.

(One effect of the above is that if you buy heating oil
in bulk it is *essential* to make sure the supplier is
aware that fuel bought in the summer will be stored and
used in the winter. Otherwise it is possible to get a
great deal on "summer grade" stove oil, and have a tank
full of jelly come cold weather.)

Moreover, Both #1 and #2 "diesel" are regionally
defined, with each refinery deciding exactly what they
will sell under those names.

--
Floyd L. Davidson http://www.apaflo.com/floyd_davidson
Ukpeagvik (Barrow, Alaska)