Hello everyone! I have a '04 RAV bought new @6/04. Currently have 10 k miles. I changed oil twice before 5 Kmiles with regular oil.Changed twice since then with Mobile 1 ,10w-30.My question is since Iam averaging about 700 miles per month ,how often should I change oil using Mobile-1?Also ,any one have advise on oil and air filters.Thanks in advance.Skippy