Sorry, but I still think it's a sales pitch. If I want to buy one tire and you tell me you cant because the mfd suggestes different. Unless I'm asking them to do something unsafe then who cares, and as long as they inform the buyer that it could result in drivetrain damage then they've passed the liablity onto the customer. I'm not arguing about what the mfd suggests, but the fact that the
dealer is using that as an excuse to persuade someone to buy four NEW tires is a sales pitch to me.