If I lend my car to my friend for business use (maintains a rental property), can I or he deduct the mileage on the car?

[uptpilot]

The car is titled to me and I bought it outright.  I have no relation to my friend's business.

[JohnG1]

A couple of things here. In order to deduct mileage you need to claim a business and deduct it there. SO that's not going to happen. Here's where it gets  a little sticky. In order for him to deduct mileage the car has to be invested in by him (by that I mean he has to own it SO that's not going to happen).  If he were paying you on a lease basis you could claim it but you'd still need to claim a business. Better to let sleeping dogs lie.