Couple of weeks ago I changed oil and filter. First since rebulid, noticed when i started the red oil light stayed on for just  a couple of seconds.  Did not do it with the filter John Mummert used,which was a Ford Motorcraft. Kinda got to thinking, wonder if the new K&N oil filter could be causing it, so yesterday put on a new Ford filter back on. Now oil light does not come on, Ford filter must have some sort of check valve that does not bleed down.  Anyone have an answer to loss of oil pressure??  Anyway will be using Ford  original filters from now on. I figured  K&N is a good name for air filter, so would be good for oil.   God Bless 

Eddie

Lake Forest, Ca. 92630