CREATE TABLE table_52342 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

what is the grid when the time/retired is oil pressure and the laps are more than 50?
SELECT AVG("Grid") FROM table_52342 WHERE "Time/Retired" = 'oil pressure' AND "Laps" > '50'
SELECT AVG("Grid") FROM "table_52342" WHERE "Laps" > '50' AND "Time/Retired" = 'oil pressure'