You can use points at Shell. Max discount is 10c/gallon (on already marked up gas).
Not sure where you saw that... I use at Shell when I rack up 2000 points and I always get $2 discount (upto Dec 2012. After that it is max $1 (1000) discount per transaction).. And gas price in Shell in my area is competitive too..
Last edited by slickpokerdealer; 11-12-2012 at 01:15 PM..