I had a 76 Ford Elite. One time I used Sears Spectrum 10-40 and a Sears filter. On a subsequent visit I was talking to the guys in there and they informed me of a filter recall. They gave me new oil and filter to change it out. It seems that those filters had no core in them. The one I pulled off had a spiral wire inside. The filter media looked like cotton that could get sucked through the engine. Although I was worried I never had a problem.