hafa dai -
oil leak could be from the valve cover and to repair you get one these
http://www.pelicanparts.com/cgi-bin/...2Fis%2FiC%2Fti not to difficult diy project.
would also check your front lower arm and bushing - know roads on Guam can be bumpy - Marine drive in Hatagna
Use Mobil 1 15-50 in the 5 qt pail from Walmart ($27). Heard when going to synthetic oil go with heavier oil as light ones may cause seals to leak...