I have a 2008 RAV-4 with leaky tires. The tires will slowly deflate from 35-20 psi over the period of a week or so. I have checked for nails without finding any. In the past we have taken them into a tire store and had them pulled to check for nails without ever finding anything. They usually reset the tires and tell us the seal between the wheel and tire was bad and they put some stuff on it and send us away. This will work for about a month and then it starts happening again.
We live on the end of a 1/2 mile dirt road. Is it possible that the dust that is kicked up by the car on the dirt road gets in the seal and degrades it? If so is there any “magic” solution you have run across or do I just stop at the gas station with free air every couple of days to top them off. Also why would our other car not be affected. I am assuming the RAV4 has good wheels or the tire place would be all over selling us some new ones.