All of our own current modern cars seem to have to go a couple of miles to get heat as well. The colder it is the longer the distance of course. You may improve it slightly by changing or pulling the existing thermostat and replacing it. It may not improve it either.

I always bring thermostats up to opening temperature with them immersed in a pot of water and a thermometer on the stove. Even new ones before installation. In fact always as I seldom would re install an old thermostat even if it checked good.

I preffer not to use chinese thermostats but it is getting to the point that is all there may be all too soon. I am also getting to the point of checking the oil cooler to see if it has any temperature after only a couple of miles with a thermal reader. Just in case it's circuit has an open thermostat.

We have not been checking this but it is possible for the oil cooler thermostat control to fail as well even if rare. We have no way to know yet how rare it might be as I feel it has been generally ignored. If we find even one or two have failed open with site members maybe things will change.