Cs641

I have a question on how long you guys run your trains time wise on your layouts. Currently I only have an indoor layout that we setup for about 6 weeks around Christmas time. Because the layout is only operating a few weeks a year we tend to run our trains at least 8 hours at a time more or less every day for 6 weeks. Is that too long of a run time in one stretch? On a side note I've heard folks talk about wheel and track wear. I've yet to see any wear on my wheels(mix of plastic and metal) or the curves on my track(brass) and I'm wondering what to keep an eye out for. I doubt we do enough running but it's mainly out of curiosity. Thanks!