"Save 30 cents a gallon when you spend $50 or more at K-mart"?
So on average you might fill 10 gallons and save $3 on a $50 purchase? Is that including tax?
I guess their signage advertising that 6% sale on $50 items (or spend even more and save a mere 3% on a $100 item) didn't work.
Big ass? You'd have to be a dumb ass.