Table: indycar_stats
Columns: year
entrant
chassis
engine
points

Question: What was the engine of the Hoover Motor Express after 1955 with greater than 0 points?
SQL: SELECT "engine" FROM indycar_stats WHERE "year" > 1955 AND "points" > 0 AND "entrant" = 'hoover motor express'

Question: What is the average year that the Belanger Motors had an Offenhauser l4 engine?
SQL: SELECT AVG("year") FROM indycar_stats WHERE "engine" = 'offenhauser l4' AND "entrant" = 'belanger motors'