what is the engine oil capacity for Corolla 3ZZ-fe engine? I have known it to be 3.7 Liters. I recently got the oil changed from shell Petrol Pump (Yellow Bottle 10W-40) and later I noticed that the oil changing mechanic poured in whole 4 Liters. Is it Okay? or should i get the oil slightly drained? the engine condition is okay and it does not drain/reduce oil itself.