OP here... our dd17 has been the chauffeur to all her friends (none have a car to use), with the car we pay for (like most of you, wanted her to concentrate on her education, and she works part time in our family business). Her car is a 2016 Subaru Forester (we use it 1 day a week for our business, the rest of the time it's hers to use). We had an older car for the business, but upgraded when she got her license. All was good with this arrangement until we realized how many miles she and her friends were putting on the car. 282 miles last week, just from her driving around, going to see friends, taking them to the mall, etc. We live fairly rural, her friends house is 12 miles from ours, then the mall is 11 miles from there.
We told her that this arrangement wasn't working, and if she wanted to drive her friends all over, she'd have to pay for it. We figured she has to pay 50 cents a mile. We fill up the tank once each week, if she uses it all she has to put more gas in. We pay for everything else for the car. So 282 miles last week, and I deducted 50 miles for her going to work, etc. So 232 miles equaled $116 for her to pay for 1 week of driving. It's a lot. But we don't know what else to do. She's not getting the fact that it's expensive to run a car, she can't say yes to every friend request, or she has to ask them for some money to chip in. Something...
Can she ask her friends to chip in for fuel?