Star Fire Coolant

like may others i have a question about coolant. I know there has been many debates and I really just want to know if anyone has used or heard of this brand and if it is usable in the 70 Swinger? I assume it is yes but figured i toss out the question and see what kind of trouble i could stir up:)...... but the main reason I am asking is I have a tractor company I do work for that sells this stuff for $10 a gallon, the next cheapest I can find around me is $17.99 a gallon. So why is this so cheap?

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