Synthetic oils

Im skeered of synthetics. I thought I`d treat my baby to some, mobil 1 I believe it was, It seemed to improve a little according to butt dyno, but one day I went to start her up and heard tapping, noticeing no oil pressure I quickly shut her down. Replaced sender, same crap, oh **** now what? Only about 2000 mi. on the oil I dumped it and changed filter. Went back to my trusty valvolene 5w30, fired it up, and got my oil pressure back wtf? Are their filters designed for synthetics? That was enough for me to shy away from syns`for the cuda anyhow:scratch: