chevrolet has solid motors but because of recent loans to keep them afloat they need to cut corners in some areas.
dodge has solid motors. only line I recommend from then is a v8 jeep grand cherokee. but it rides hard.
ford vehicles are solid. ford has no loans and doesn't have to pay anyone back so they don't need to cut corners.
Mazda is a throw awake car company. buy the car and toss it in a few years.
it depends what you need it for. kf it is local commute then get a car that has been on the line for years. example: chevy impala or malibu. ford lincons are good. dodge grand cherokees keep going up in the 250,000 mile range
if its a truck for commuting get chevy. for pulling get ford