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_72 (points INTEGER, entrant VARCHAR, year VARCHAR, engine VARCHAR)

### Question ###
What is Brown Motors best point total using the Offenhauser L4 engine since 1950?

### Accurate SQL ###

SELECT MAX(points) FROM table_name_72 WHERE year > 1950 AND engine = "offenhauser l4" AND entrant = "brown motors"