CREATE TABLE table_name_20 (laps INTEGER, driver VARCHAR(255), time_retired VARCHAR(255), grid VARCHAR(255))
What's the least amount of laps that George Eaton completed that has a time/retired engine and a grid larger than 8?
    
SQL: SELECT MIN(laps) FROM table_name_20 WHERE time_retired = "engine" AND grid > 8 AND driver = "george eaton"