Rio Grande Valley residents are turning to pre-paid gas cards to save money at the pump.
As gas prices rise, many gas stations are offering discounts for customers who use pre-paid cards.
A per gallon discount is automatically given at a gas pump when a customer uses the card.
Among the companies offering the pre-paid gas card savings are HEB, WalMart and Stripes.
Shell gas stations give a discount to customers using their credit card.
Customers who purchase an HEB gift card and use it when filling up will save 12 cents a gallon.
The promotion is running through December 31st at HEB gas stations in San Antonio, Central Texas, Gulf Coast, border and the Rio Grande Valley.