The series reverted to rules of the inaugural season, where each manufacturer was permitted to nominate up to four cars in each event.
[1] At the annual press conference during the 2017 24 Hours of Spa on 28 July, the Stéphane Ratel Organisation announced the 2018 calendar.
[3] NOTE: California 8 Hours results announced 27 July 2019 following review when the original winner, the No.
Individual drivers were required to participate for a minimum of 25 minutes in order to earn championship points in any race.
Bold – PoleItalics – Fastest Lap Only the top two cars for a manufacturer are eligible for points.