I live in ny and the weathers been hot and i'm going to the strip the next 4 weekends and i'm due for an oil change what weight should i use. I normally just run mobil 1 5w30 but i was told for going to the track i should run mobil 1 15w50 what do you think. I'll end up doing another oil change at the end of the month just becuase it will be a hard month.