Stop in for a cup of coffee

essentially, heating oil is allowed to have more sulfur/zinc in it i believe but we're talking microns worth of difference. Good old off road number 2 is all we run, the on road new stuff tears up the fuel pumps in the tractors, especially the old Bosch A and P pumps on the older 40 series John Deeres.
My father in law had a tank outside for tractors, loader etc. Pretty sure they filled that and the house heat with same thing. I know a couple times the house was low and he had a lot outside he asked me to dump a few 5 gallon buckets in the house tank...