10 miles per day, usually dry, dirty roads. No dirt roads.

I use dry lube to reduce the nasty oily greasy build-up in both the chain and cassette. I usually lube the chain every 3 weeks or so, depending on if it's been wet. Every 500-1000 miles, I pull it off and give it an overnight bath in mineral spirits and re lube. Visual inspection every morning. Working pretty decent so far. If it sounds gravel-y and dry... it is.