News ‘It’s a different world’: Third OEM or not, days of 40-car Indy 500 entry lists are gone May 21, 2023 Nathan Brown, Indianapolis Star Comments Off on ‘It’s a different world’: Third OEM or not, days of 40-car Indy 500 entry lists are gone For more than a decade, IndyCar has been searching for a 3rd engine manufacturer. It, however, isn't to blame for slim Indy 500 entry lists.