I would also advise not giving away free oil changes. You will set yourself up to get those customers who just want free things. These are not the customers you want. I don’t know I your state has safety inspections. If so do those for a cheap rate to get customers in the door. Also offer tire fixes patches or plugs. If a customer I have never met comes to my shop I alway give the first plug tire free and say bring it back when you have a real problem. Also free obd che KS will get people in the door. Honestly there are so many cars ifyou open the doors people will start showing up