Jon,
When I converted my heating system over to gas I had about 100 gal. of
fuel oil in the tank. The gas install guy wanted to take my old oil for a
fee,
tried to convince my wife. Don't you just love when they work on the wife.
I said like hell, drove the entire summer on my old home heating oil
without a problem. Have an 01 Dodge with the Cummins Turbo Diesel. I would
say
it will burn just fine in your Duramax. Home heating oil is the same stuff
as #2 Diesel....it comes from the same holding tanks. They add the red dye
to the delivery truck during the fill up. I know the owner of a fuel oil
company, so I believe what he tells me. Hope this helps.
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