CREATE TABLE table_58648 ("Season" FLOAT, "Date" CLOB, "Winning Driver" CLOB, "Car #" FLOAT, "Sponsor" CLOB, "Make" CLOB, "Distance" CLOB, "Avg Speed" CLOB, "Margin of Victory" CLOB)

What is the highest car number sponsored by Post-It / National Guard?
SELECT MAX("Car #") FROM table_58648 WHERE "Sponsor" = 'post-it / national guard'
SELECT MAX("Car #") FROM "table_58648" WHERE "Sponsor" = 'post-it / national guard'