Table: jackie_oliver_results
Columns: year
entrant
chassis
engine
pts

Question: What is the highest number of points the cosworth straight-4 engine scored?
SQL: SELECT MAX("pts") FROM jackie_oliver_results WHERE "engine" = 'cosworth straight-4'

Question: What is the latest year that shadow racing team scored more than 0 points?
SQL: SELECT MAX("year") FROM jackie_oliver_results WHERE "entrant" = 'shadow racing team' AND "pts" > 0