Quote Originally Posted by Bio248 View Post
you guys are missing the point. he is asking about what WEIGHT of oil you run and why. anyone following the oil cap or manual is being mislead. you must right the right weight of oil for your elevation, climate, wear range, etc.

i ran 10w-40 because even in the hot summer my oil pressures would stay up. when i was running 5w-30 or 10w-30 my oil pressures would drop too low for my liking. i think the thicker oil is what kept my car alive for so long.
10w 40 so in the chicago area in the summer would you recommend it?