Few things are more aggravating than being in the process of reserving a car rental online and coming across the question “Do you have a promotional code?”—and not having a promotional code to punch in. I imagine millions of travelers knowing the secret coupon to use, while I sit here stupidly missing out on a discount. Sure, rental car companies alert customers about their promo codes all the time. But you have to sign up for each company’s e-mail newsletter to get the scoop. That means reading at least a half-dozen e-mails per week, each containing a bunch of codes and fine print. And to dig up other stray coupon codes that are out there in online forums, you have to troll sites like FatWallet , SlickDeals , and FlyerTalk , too. Who has the time? Thankfully, the free new site AutoSlash aims to do all of this homework for you. It plans to be a one-stop shop for finding and applying promo codes for rental cars, the way AirfareWatchdog tracks promo codes for fares. This is especially powerful for taking advantage of the amazing promo codes that deliver one-way rentals for as little as $1 a day , which we’ve blogged about before. Even better, AutoSlash puts money back in your pocketbook if a rate drops after you’ve booked. If you’re like me, you don’t keep track of whether the rate goes down after you book a car. AutoSlash will e-mail you if the base rate for your rental has dropped, automatically re-booking you at the new lower rate. Using AutoSlash feels just like you’re booking a car on an ordinary online travel agency, such as Orbitz . Its search tool is just as powerful as what you find at major travel sites, and it covers the same range of locations worldwide and same selection of cars.

Original Source Rental cars: AutoSlash may find cheaper rates than you