My mom has one also...which is one of the problems!
I have owned a few Fords . The local dealer was always niceabout trying to keep their customers satisfied . I know the service mgr pretty good ,he told me the fusion was a good car . At 100,000 miles they don't have many problems . They had a good service program also after several visits a free oil change and points and such . Oil changes were in the low $30 range . The Chevy I have ow is about $50 at the dealer and elswhere .Good luck and ask for the history on your car also for wrecks and so forth . I will do that next time myself .
$50 for an oil change? No reason a Chevy oil change should be that much higher than a Ford unless one is getting synthetic and the other one isn't. Most dealers run cheap oil change specials to get you in the door so they can sell brakes, tires and tuneups. I have never paid for an oil change myself but I see no reason why there is a $20 difference between 2 makes.
It's not limited to just dealers, local, franchise and corporate all advertise low oil change prices just to get customers in so they can try to upsell it is, how they make money