Purchased K&N oil filter and installed with 6 qts. of GC in my 383 stroker. Had a small leak at filter seal at first....so I snugged it down a little and it was fine from then. Since then the weather has gotten colder, and only on cold start ups in the morning (about 38*F-40*F) it leaks!!!! About 1-2.5 tbl spoons then it stops. Do I need to screw it on tighter, or is this a warped casing which becomes evident before heat expansion. What should I do??? I have tremendous respect for all of you on this board and need some advice.