Originally Posted By: gfh77665
Thank you all for the great replies. Since we do drive 90% highway, I have changed them at every other 5000 mile OC. I know 10K is a lot of miles for the NS, but most of our vehicles non-severe service schedules call for 7500 OC anyways, so I figured going 2500 extra miles on them isn't "that" much more. I also assumed the hot TX climate would help keep the ADBV flexible, too.
When my supply of the Silvers is used up, I will go back to NAPA Gold.
I think the heat would make the valve harden more quickly, noticed especially at cold start up.. For the low cost of that filter, I wouldn't even consider two runs.