The promotion takes place from 10:00 a.m. until noon today (March 29, 2011) at the Sunoco station at 710 Easton Road in Willow Grove, Pa.
The first 100 customers who show up with the printable coupon you can get by clicking here, will get the gas deal courtesy of Spark Energy.
Customers may begin lining up for the promotional gas giveaway no earlier than 9:50 a.m. and must enter through the Ellis Road entrance. Participants must have printed coupon at time of purchase. Limit one per customer per car.