OK, so when you punch it twice & the wrench comes up with a number like 3,500.....that means it's suggesting you have 3,500 more miles before you need to change your oil right? I was just freaked out cause when I pulled in the garage today & noticed....it was exactly reading 3,500....I thought maybe it was saying I should have gotten the oil change back when the car had 3,500 miles on the odometer....it has about 4,200 on the odometer right now.