For those of you who dont know, Murphy USA is the gas station at Wal-Marts.
You will first have to register on Murphy USA's website to get coupons of any sort:
http://offers.murphyusa.com/
After registering if you only see a coupon for $2 off $10 or more for Premium or diesel expiring 5/31/10, be sure to print it, as you won't see the offer again.
Then log out of the webpage.
To get the $3 off $10 or more for any grade of gasoline at Murphy USA, log into the following site:
http://offers.murphyusa.com/coupon_f...ollarsoffB.jpg
Again, the $3 off a $10 or more gasoline purchase of any grade at Murphy USA expires at the time your Murphy USA station closes, today, 5/24/10.
You may want to use their store locator to find the nearest Murphy USA to you, and the hours that the gas station is open, as I have found that hours vary even within a city [I know that one Murphy USA location in my town has different hours than another location]:
http://murphyusa.com/locator/