My purolator pureone oil filter is leaking very little on the underside of the filter. Oil level still reads over 1/2 mark. It wasnt leaking after i did the oil change for about 1500 miles, but now it's visible. I notice slight rougher idling and poorer driving performance. im waiting for the weather to cooperate somewhat until i change it out. If i was to change it out in at another 1000 miles, would it be ok or should i be worried right now?