Shameless plug here, but perhaps consider a cash-back incentive.
I've been using the
GetUpside app and so far I've gotten $175 cash-back. This is from February last year up until December.
I've cashed in two checks and both cleared within a day.
Another great thing on the app is that it shows you the Shell stations (or any other station of your choice, really), and their gas prices right there. It's very convenient, if nothing else.
Hope this helps some.
Leo.