I'll share this for what its worth to others.
In early 2008 I got 20grams of dbol powder which I had put into caps at 40mg. So I ended up with approxmiately 500 caps. I would take one cap before most of my workouts for about the next 2 years. I gave away dozens caps but I'm sure I took say 350-400 caps myself over a bit more than 2 years. So yeah I was using 3-4 caps every week I would train. Sure there were some off weeks and on rare occasion I'd take 2 caps 80mg just to see if it made a difference.
The fact is when comparing my liver values after doing this to what they were prior to the start, they almost didn't change. My ALT was 1 point higher but my AST was one point lower. Now I did have labs done throughout this time period of course and at their worst none of my values moved very much from the start to finish.
This of course runs contrary to what most assert about a 6 weeks max on orals. Now I'll concede the likely most important point that I was taking basically 3-4 caps a week; this is what most guys take in a day. So I suppose the theory behind my relatively untouched liver might stem from the infrequency which I passed these 17AA's thru. I don't know all the science why I'm just telling you my facts.
BTW, the reason for this kinda of use for dbol was as a training enhancer. I always had a steady supply from my injectables. 40mg of dbol 45 minutes before training usually got me an extra say 5% on my top end strength or a couple more reps if I was doing rep work. I was still pretty much PLing during this time.