CREATE TABLE table_name_33 (laps INT, grid VARCHAR, constructor VARCHAR, time_retired VARCHAR)

Name the highest laps for maserati and +6 laps for grid more than 11
SELECT MAX(laps) FROM table_name_33 WHERE constructor = "maserati" AND time_retired = "+6 laps" AND grid > 11
SELECT MAX("laps") FROM "table_name_33" WHERE "+6 laps" = "time_retired" AND "constructor" = "maserati" AND "grid" > 11