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