First off I never used to have problems with my oil pressure until a little while ago, it was dropping very low under 15, and into the red so I replaced the oil pressure switch at first it seemed like it worked, but now pressure is dropping low again, and I got to thinking the other day, and reliezed the last 2 times I changed my oil filter I used a Bosch brand oil filter, and Im wondering if that could be the problem maybe its not flowing oil through it properly? Has anyone else tried one of these, and had a problem with them? Any help would be great thanks

 

This would be interesting to know the answer, because I'm having the same problem, and am about to change the oil pressure switch. I don't remember what brand I have, I think it's the same I've always used, but I'll check to see if it's different. And bump for a good answer...