From what I known about FRAM, it seems to restrict oil some. This is from personal use. I had a 1970 Chevelle. I built the 388 stroker motor for it and installed it in my car with an orange FRAM filter. I did it for color not for function (stupid I know). Well during break in of my cam I started the car, reved it up, and my oil pressure was not as high as I wanted it to be or should be. I had pressure, but it was on the low end of what I consider normal. I continued with the cam break in and shut the car off. I drained the oil, changed filter to another FRAM with the same results... I thought I screwed up something in my build. I babied the car for a week then changed the oil again but used a delco filter. When I installed my delco filter my oil pressure instantly hopped up to where it should be. After that experience I will never use a FRAM. Like I said, this is my personal experience. Others love FRAM.
Personally I now use Bosch and never look back.
