Anyone remember the two stations within sight of each other at Goshen last year? Something like 30-cents difference in the diesel prices on their signs. It was worth the wait in line for that kind of savings.
The grocery store we shop at while at our rig provides discount coupons for their fuel station across the street, based on your grocery purchases. Anywhere from 10 to 30-cents a gallon, up to 20 gallons. Their sign prices are equal to the competition around them, too. Nice when I get a 30-cent and a 15-cent coupon and use them both at the same time (they allow two at a time). BTW, their grocery prices are as good as any Wallyworld and have better selection and quality.