CREATE TABLE table_11681 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

Who drove the maserati under 18 laps with an oil leak that had a grid of under 14?
SELECT "Driver" FROM table_11681 WHERE "Constructor" = 'maserati' AND "Laps" < '18' AND "Grid" < '14' AND "Time/Retired" = 'oil leak'
SELECT "Driver" FROM "table_11681" WHERE "Constructor" = 'maserati' AND "Grid" < '14' AND "Laps" < '18' AND "Time/Retired" = 'oil leak'