<prompt> Human: If so, when and why? When you dont, why not?A friend asked if we could swap cars over the next few days while she and her boyfriend go out of town because mine gets better gas mileage. I told her no, for a number of reasons, one of them just being that I basically dont let people borrow my car ever. SOs and extremely longtime friends being the few exceptions. I have always been uncomfortable with letting someone else borrow my car. I cant really quite put my finger on why. EDIT: I only carry liability, so probably thats why - thanks uMissMalynn for reminding me. I think it might be primarily because my car has always been my most valuable possession and Ive always paid cash for my cars not that I ever have a really nice car what I have now is just a 2000 Elantra that I paid 2600 for about five years ago. I think a secondary reason may be that I blanketly consider other people irresponsible and Im not interested in proving that theory one way or the other with my car.I considered posting this in rsocialskills or maybe even rrelationships but for me I think of this as a personal financeresponsibility issue so here we go.for reference, Im a 29 year old guy and on my 4th car, if that means anything  <response>: I have in the past and it ended up in disaster each time. Hundreds of dollars worth of tickets was bad enough but another friend upped the ante by using it to conduct illegal tasks. Dont do it. If something goes wrong you will be responsible for it, regardless of whether you knew about it. The police will hold you responsible. They will also not help you nor will a small claims court award you damages. 