Full Synthetic oil in 2016 Dodge diesel

I'm used to 10,000 mile oil changes on full synthetic oil in a 2001 VW Jetta turbo-diesel, and 12,500 mile OCI on a 2005 Jeep Libby turbo-diesel on full synthetic, and 13,000 mile on a BMW. The last of these has an oil change sensor which is indeed sensitive to whether I'm towing. All three require full synthetic oil for the turbo, and I bet the OP's RAM would also need it for the same reasons. There is, in fact evidence that changing such oil early INCREASES wear. So do what the mfg says to do. Do NOT stick with the 3-5,000 intervals just because you have done that in the past.