I have and still think that she dumped the body before daylight and then dumped the car and then jogged/walked back to her parents house to clean up. She had to stink after handling the body and wouldn't want anyone to be around her until she cleaned up. It's only 7.21 miles from Amscott to her parents house. If she took short cuts, then even quicker for her.
night of 26th until daylight on the 27th she dumps body ----->
before 7 a.m. (before Amscott employee arrives to open for business at 7:00 am runs/jogs to parents house to clean up, grabs food from parents house so that she has an excuse to make it look like she's been busy shopping (she probably didn't think TonE would notice the food didn't come from store --->
11:00 a.m. on 27th she calls TonE to pick up her up, she's already waiting outside of car ready to hop in TonE's jeep so that he wouldn't get out of his car to check hers out. She tells him it's mechanical problems rather than out of gas, because he probably would have offered to go get gas and bring it back. She was determined not to let him get near the car because of the smell