35,000? LOL thats some sludge even running 100 dollar amsoil synthetic
No, they are new synthetics that can run at least to 50k miles, as long as you change the filters every 10-15k miles and sample the oil at the same intervals.
This is a big colossal joke, right?
Change it before the road trip and seafoam it at the same time.
This road trip happened long ago. The OP has probably changed his oil 2 or 3 times since.