I changed the oil in my 05 Elise 10-08. I have not changed the oil since but have put on only 600 miles since. Should I change the oil soon or just change it again before winter hard? No track use. Now the thing is not garage queen but I do push it but not that much. Total milage a year will not be more than 3k a year. Should I change it in the spring and the fall for wait and do it before winter?