I just tried to create a file for another vehicle.  It seems that you have to also have a blank field in each record even for the optional fields (MPG,GPS coordinates, City) or the import will fail.

The sample that I received from Adrian had every field in double quotes separated commas.  Also, the date was in yyyy-mm-dd format (also enclosed in quotes.  The quotes and the date format were the only two things I saw that I had not attempted.

I've tried multiple times with slight variations (dashes instead of slashes in dates, no optional fields, etc.). Either every row is an error or the app crashes. I'd be happy to send you the CSV file.  Perhaps you could inspect it to let me know where my problem is. Thanks.