My previous discussion can be read here. Today’s deal from American Airlines 30th Anniversary promotion is with AVIS.

Book with Avis from 4/19 to 6/15 for rentals between 4/19 and 12/15/11 and earn triple miles per day for any rental up to 3 days plus receive a discount of up to 25% off your rental. Use coupon # MUAA043 and AWD # K817100. Also, enter to win a 2012 Chevrolet Camaro from Avis.

The standard mileage earnings from an AVIS rental is 50 miles per day, but this promotion would triple the miles to 150/day.

I ran some quick scenarios and can get a weekend daily rate after taxes and fees of $27.52, for which I would receive 150 AAdvantage miles. At a rate of over $0.18/mile, it is not worth even considering. If they had thrown in some bonus miles, it might have been a totally new game.