Question: What driver had a total time of 16:58?
SQL: SELECT "Driver" FROM "2-18394791-5" WHERE "Total Time" = '16:58';

Question: What's the lowest capacity when the margin is 03:30?
SQL: SELECT MIN("Capacity") FROM "2-18394791-5" WHERE "Margin" = '03:30';

Question: Which vehicle has a class 6C3G?
SQL: SELECT "Vehicle" FROM "2-18394791-5" WHERE "Class" = '6C3G';

Question: What is the lowest capacity for the 1975 Toyota Celica 1600GT?
SQL: SELECT MIN("Capacity") FROM "2-18394791-5" WHERE "Vehicle" = '1975 Toyota Celica 1600GT';