The one near me has the Royal Oak briquettes for $4 a bag.
I just read a detailed thread on another forum where they compared the burn times for the RO to the latest reformulation of Kingsford blue bag. The RO beat it by a mile for burn time (much longer). From what they showed in that test, Kingsford has done themselves a disservice in this latest formula change.
The other thing I saw is the limit of 6 bags of RO at Lowes for $4 is a "suggestion" and not a hard limit. Time to load the truck bed!