Similar to the Drive Free promo - what does Avis consider 4 days -- I have a 3 day 15 hour rental coming up. Should I put in the 4 day code, or do I have to be resigned to the 3 day code?

Also, I noticed this in the terms: Offer may not be used in conjunction with any other AWD number, promotion or offer. Does that mean I can't use the AWD I have in the rental already - strange cause they don't specify a required AWD...anyone have any insight on using this promo? Thanks!

-Mike