Excellent summary of National Car Rentral Codes on this website:
http://www.fatwallet.com/t/63/521905
The contract codes with the best rates are:
5760339 - Try this one first. It ususally gives the best rates. It is Carlson Travel.
5125601
Add coupon from BJ's - print it out as sometimes they ask to see the coupon:
http://www.bjsvacations.com/promotion/bjs/carrental/BJ_national.pdf
http://www.fatwallet.com/t/63/521905
The contract codes with the best rates are:
5760339 - Try this one first. It ususally gives the best rates. It is Carlson Travel.
5125601
Add coupon from BJ's - print it out as sometimes they ask to see the coupon:
http://www.bjsvacations.com/promotion/bjs/carrental/BJ_national.pdf