My mpg is correct, but I can't find any of my older tanks. I'm sure this has been addressed. Do I need to erase my car and start over again? I still have the data in excel. I want my miles on the database to match up with the miles on my car. Since I bought my car used, the database is only adding miles to my original mileage when I bought the car and not including all of my other tanks in the mileage. Does that make sense?