I bought a used 08 2WD sport trac with 47K miles on it. About to hit 50K, and since I don't know what maintenance was done on the truck, what all should I do at 50K? I have the manual, but wondering if I should do any other maintenance other the oil/filer/air filter at this time? I really want this truck to make it o 200K! I only put about 9000 miles a year on my vehicles. The only thing I know for sure is that the radiator was flushed recently, and oil was changed at 45000. thanks!