CREATE TABLE table_204_115 (id DECIMAL, "year" DECIMAL, "track" TEXT, "number" DECIMAL, "team" TEXT, "car" TEXT, "round result" TEXT)

the first car that murphy used in the new zealand v8 supercar
SELECT "car" FROM table_204_115 ORDER BY "year" LIMIT 1
SELECT "car" FROM "table_204_115" ORDER BY "year" NULLS FIRST LIMIT 1