While the general strategy is interesting, the secret lies in how its all communicated to the customer. There is nothing worse that having a consumer feel that they have been suckered into business something they did not expect.

First of all two hours to wait for an oil change seems a bit much...one thing is if they actually need all that time. Its another thing if they simply taking advantage of the consumer to see what more business they can make.

The promotion needs to be transparent...from the first moment you know you are getting the oil change and free check up as a combined offer. Then you know what you are in for. Its a different story if they tell you that even though you came in for the oil change, they will do a check up for free.

A big opportunity for Midas here is to compete on maintenance with the car dealers that tend to be really expensive.

As I said before...the idea is powerful, but success comes down to how its communicated and executed with the consumer.

Absolutely agree: Communication plays a key role for keeping the customer satisfied and handling expectations. If not, this will generate sales in the short term, but would destroy brand value and customer loyalty.

If I were Midas I would try to build trust with my customers first.
In our advertising balloons business we get a little different situation. Clients purchase a product that we believe, having 30 years experience, is not the right product for their intended usage. Our approach is to give the client our advice while telling them straight forward that we know it's their money and we respect their decision if they want to continue with that purchase.
Once the purchase is made, if we feel that the life time value of this new client is sufficient, we will offer for their next purchase to upgrade them to the product we think is really right for them. If it is a current client we will often send an upgraded product with the current order.
If you believe in your product, your knowledge of your business and the client's application you can truly build clients for life.
Build trust with your clients and TRUST your clients. Do we ever feel like someone has taken advantage? Sure! But, the vast, vast majority of clients over the past 30 years have shown that this works.