Bought car 6 mo. ago, had this problem since I bought car, dealer said if it doesn't happen all the time, they couldn't fix it. That was fine in the summer but when I had to have it jumped 3 times in the parking lot at work in -10, that's a problem. Brought it back, still wouldn't fix it. Car is 6 mo. old, 13,000 miles, lost 6 grand in value. My mpg were 24-33 thats terrible. My folks' big Buick gets 30 and it's a nice ride, not like this.
Get better service, give out loaner cars if service will take 4 hours or more.