I would make sure that if you ever sell it you are honest.
I stated that several times in this forum. I'll fully disclose the mileage when I sell it.
A carfax report can show mileage records for various things.
I seriously doubt it'll ever show up on carfax. Don't believe their hype that they are collecting all this data on every car and that if nothing shows up on a carfax report you'll be assured the car is clean. Carfax even admitted they only collect about 5% of all possible data out there. So there's a 95% chance that my vehicle WON'T be in their database. Carfax is pretty much a joke. I wish people would wake up and realize how pitiful it is and maybe they'll go away.
Here are just a couple of articles about Carfax...
Carfax CBS News Report
CARFAX: Are the reports reliable? - AmericaNowNews.com