I worked in the car business in sales for several years in NH and there is a term that we came to know as "TMU" which stands for true mileage unknown. It would be labeled on the title as such. in the case of a newer car it cut the value in half. with a vehicle that is almost 20 years old, i would recommend pulling a carfax report for about $15 and see what the last recorded odometer entry is on there and also im unaware if when you register your car if you need to tell them the mileage or not. I would just make sure that your new odometer is over where that number is and nobody will know. I've never done that but i know many people that have. if you go under, when it is registered upon a sale the new title would be tmu and that could bite you in the ass.