Dude, you spent roughly 20 hours/week behind the wheel AND you worked a regular 40 hr gig? To be fair tho' I spent 12-15 hrs/wk commuting into the city back in the day on top of my 40 so I guess it's not that unusual.

Welcome. This is really the only place to get the right answers about your Mirage. We had a guy, I forget his name who had his "cheap plastic" car and I think he got to 330,000 miles or so.