dealerships in the US are nicknamed "stealerships." People typically don't go to the dealership for service once the warranty is up, if at all. The dealerships in my area charge as much as 4x the cost of independent shops for maintenance: $120 for an oil change at the local toyota dealership vs. $30 at the garage 1/4 mile down the road. The dealership is also more likely to find non-existent problems with wear parts like brakes, belts, filters, suspension, etc to upsell you or push you to the sales department.