Know-How Exchange : Advertising/PR

You've got to run a customer retention program. Handing out promotional items for a gas station won't drive business. People choose gas stations based on convenience and prices not just gas prices not T-shirts or other promotional items. The only promotional item I can think of that would incorporate that concept into it is a coozie that get's them a discount on beverages when they bring it into the store.

I do not think you can really enhance retention unless you gather data on customers.Who they are,how often they come to fill it up,at what time, do they buy snacks and drinks or drinks only,wash their cars,etc.Having built up the data base and knowing which customer segment does what,you will find it easier to do something.Given the knowledge you have about which sales are most profitable you could think of tiered offerings for different segments.
Most probably some buy on price only, some on location or convenience,still others may like the way you make sandwiches.

Try www.onlythebestgifts.com

Michael