Marriott and Hertz are offering a new promotion that could earn you extra SPG points for your car rental. You can save up to 35% on base rates when you rent with Hertz. Plus, for a limited time, earn 1,000 Starpoints on rentals of three days or more at participating locations through July 31, 2018. Be sure to include the SPG discount code 154080, PC 204373 and your SPG number when you book to take advantage of this offer. Rentals of one or two days will earn the normal rate of 200 Starpoints.