Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_19 ( laps INTEGER, driver VARCHAR, grid VARCHAR, time_retired VARCHAR )

### Question ###
What was the highest lap for Luigi Piotti with more than 13 grid and a time/retired engine?

### Accurate SQL ###

SELECT MAX(laps) FROM table_name_19 WHERE grid > 13 AND time_retired = "engine" AND driver = "luigi piotti"