Tried a little experiment this am, -33C outside, 40F in the shop. 2 gall of waste motor oil in a day tank, 1/2' pipe and valve (ball), open valve and no oil flows out.... too damm cold.
I am not getting anything done this week other than dirty my clothes, oil the floor and burn wood. Am going to try and plumb the tanks together likely next month . I will take my ute out of the shop and park outside and set up some tables and get to work.
Still need a couple of transfer pumps, low pressure and flow I suppose 1-4 gpm, but I will look at a couple of hydraulic gear pumps and see if that works. Standard oil burner pump will not do the job.
Ultimately I want clean centrifuge unblended oil into the 100 gall fiberglass fuel tank. I will pump from there later to a day tank and blend there. Have toyed with the idea of using a pressure washer soap injector to blend oil and rug that way,.... have to see. I use a 1 gallon graduated pitcher and blend that days blend and add to my day tank.
None of the locals share my interest in this subject so I am on my own . Post what you guys are doing or not, what works etc. Wish I had a diesel to play with, but I sold my 12V back a ways and my 7.3 is also long gone so oil heat is my thing.
-25C currently, animals locked up, wood fire on and wait for Ice Pilots tonight,! I am lucky enough to have flown in a DC 3 and an Electra when I was a air cadet and for work, so I enjoy the series and Ice road truckers as well.
Stay warm
LM