I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets.... 8 r& B* u; J* i0 w, W0 _# d7 f- F& [) Y* m6 Z( _
For me, I think car-pool is just to share part of gas "cost" and have some fun on road..... 6 [; ?, S/ {9 P8 {1 x }; m* `- p0 I( V
I usally charge passager 30 bucks for a trip.