Route from Texas to Puerto Vallarta

Are you driving a truck that uses ULSD? That may affect your route decision to maximize fill-ups of ULSD. There are none from Guadalajara to PV according to the list I have from Pemex. BTW do not use hwy 70 to get from Guadalajara to PV, its too steep when you are towing,south of Mascota unless maybe you have an exhaust brake. Use the south periferico around Guadalajara then then 601 to Tula to rejoin 15D. There is one pemex pumping ULSD past Tula. PM me if you need instructions on bypassing Guadalajara, it's complex. The new toll hwy is open to just north of Chapala, but they were working on the interchange to get onto it from 80D or 90D last spring. I will check it out again in December. You can get onto it eastbound from 15D, but not westbound last time I was there. i may get the Green angels to check it out for me in September, but there is an alternative.