The question "business/pleasure/commute" is the one that matters.
Commute = daily driving = increased likelihood of accident.
Business = any employee will drive it and most likely not care about it.
Pleasure = only driven when you want to = off peak traffic hours = less likely to be in an accident.
I'm sure that they have some sort of matrix, where above X miles it cannot be a pleasure vehicle anymore, say, somewhere between 8000 and 12,000. But, if you'll declare driving of 6000, then you have just 'given' them 2000 miles. If you drive more than 6000, then there might be a problem if you have a claim. Say, that you drove 7500 miles while just declaring 6000. . . .. They could use this as leverage against you in a claim. I'm not an insurance agent, so I don't know for sure. This reflects my opinion of insurance companies more than anything.