If that Stratus is equipped with the 2.7L engine, there may be many problems with it - the least of which would be the type of fuel that is burned. Those engines were notorious for catastrophic failures at nearly any time due to poorly designed PCV systems and the tendency to develop sludge no matter how well-maintained. Do a search for 2.7L failure and see how many results there are. --
"from a broken heart to a hole in the sky"