The championship was contested over an eight round series which ran from 9 April to 29 October 1989.
In order to be classified for points, a team had to complete 90% of the winner's distance.
Further, drivers were required to complete at least 30% of their car's total race distance to qualify for championship points.
Drivers forfeited points if they drove in more than one car during the race.
Points earned but not tallied toward their total are marked in parentheses.