It could just be technique. Are you casting shorter than you can with other outfits or are the casts shorter now on these same ones? I doubt it's the oil. In fact, you shouldn't need to oil at all. You want the spool shaft clean and dry in the bearings so the bearings do the work. With the spool out of the reel and the tension knob off, run a pipe cleaner thru the bearings and the holes the spool goes thru to clean out any gunk. Don't oil and put it back together.

Also, maybe your cast control weights or mags are too high? Or, your tension knob is too tight? Or you're not loading the rod enough on the backswing and moving that energy immediately forward? Or, the baits you are using are under or overloading the rods? just some thoughts.