I use my 4x4 systems at least once a month in both ranges. If nothing else, I play in the yard. You can you use your high range on the highway even on dry pavement as long as you have a straight strech of road, you don't want to be turning on dry pavement in 4-wheel. By all means use the 4x4 as much as you can to keep the system freed up and operating nicely. Even back and forth in your driveway is better than nothing.