Does towing add to odometer readings?

Depends.

On a modern car with an electronic odo it won't. Unless thepoweris on,the odocan't count.

On older cars with mechanical odos it might, but it depends on where the odo is hooked up and how the car is towed.Towed flat, it's a good chance that it'll continue to register. But if it's towed with the odo pick up wheels suspendedit wouldn't.

But the big thing is that it really shouldn't matter.

Just look at the ratio between the distancepretty much any car moves under its own power and compare that to the distancethat a car might reasonablybe towed and you'll see that the towed distance is really entirely unimportant.

The only time I can see it possibly make a difference is if you have a small car that you tow behind a RV, and that small car never gets used for anything else than during the RV trips.

And even at that, you have to drive that RV some serious distances, and buy the small car new before the towed/driven ration becomes of interest.