I didnt notice an difference between splitting my dosages on 60mg per day. I would either take 30mg in the AM and 30 mg in the PM or just taking it 6x per day.... I believe anavars half life is 8-9 hrs...
More than 40 mg makes me lethargic. I take it at night. But everyone responds differently. My 2 cents is take it in the evening. I also would try to find the sweet spot dose. In my case, more is not better. It's nap time.
I have never split the dosage before, but i dont see anything extremely positive or negative about doing it. go ahead and see what happens. I usually take it once in the evening like triathloncoach does and i get crazy strength gains and very much increased vascularity after a few days.