I think someone might countersue, claiming the users were taking more gas in cold weather, but not paying for the temperature-adjusted volume!
The end result will probably be a settlement where the Lawyers get millions in fees, and the consumer gets the compensation of a warning label on all pumps saying "CAUTION: Volume may be different in hot and cold weather".....
Give this man a cigar. Of course, its all easy money for the lawyers.
It's like the sticker on a ladder that says, "don't use on ice".