Destiny went to the Sunoco after leaving Wawa, which has the businesses George's Auto Care/Daza Auto Repair/Tirematic according to Google Maps. Weird that there's so many businesses affiliated with one building.
But, I'm guessing she went there to talk to someone about possibly repairing or towing her car. Has LE talked to the person she talked at Sunoco?
Also, speculating here, but it could be possible the auto repair garage didn't have the resources or time to fix her vehicle and she was recommended to a different garage, so she started to walk there. There's a Tavarez Auto Repair located at 1004 E Black Horse Pike, which isn't that far from where her vehicle was left.
I noticed that East Park Avenue runs parallel to East Black Horse Pike. If she was going to walk back to her vehicle or the auto repair garage closer to her vehicle, she may have walked along that road instead of E Black Horse Pike for safety reasons. That could explain why she left in the direction that she did.
JMO