you don't have to subscribe to enter.
$100,000 WINDFALL FUND SWEEPSTAKES: Beginning February 1, 2014 at 12:01 AM (ET) through January 31, 2016 at 11:59 PM (ET), go tohttp://www.caranddriver.com/ and complete and submit the entry form pursuant to the on-screen instructions. Winner Selection: Winner will be selected in a random drawing from among all eligible entries received on or about March 1, 2016
Limit one (1) entry per person and per e-mail address per day per unique brand presentation for the $100,000 WINDFALL FUND (referred to as the “Promotion”) regardless of method of entry.
Open to legal residents of the 50 United States and the District of Columbia ages 13 years or older at the time of entry.
those are the parts I think matter... the entire rules legal mumbo jumbo are at https://subscribe.hearstmags.com/circulation/shared/sweeps/rules/cdb/$100k_Windfall-Fund-Sweeps_OfficialRules_CDB.htm