Are you changing your oil too many times ?

The Mopar manual says (back when synthetics were still considered new) that synthetic would last 50K miles except that it gets dirty. I bet you would be better off using the time/distance method as a general guideline- AND CHECKING how dirty/viscosity of your oil is would be the best bet to determine when to change it.

The manual swore by Mobil 1 and others here say that Mobil 1 is not the same oil (quality) that it once was-something about gov mandate allowing synthetic labeled oils to be a % of blends...

I think if you ran a cheap oil & filter (for whatever reason) you would be safer to change your oil too frequently. my two cents