im running mobil1 5w30 right now but i was wondering if i should go to 10w30 for the summer time it does get up to 100 degrees here in MI. Someone who knows there stuff please help!

On an off note, has ne1 tried that mobil1 5000, 7500 or even 15,000 Im gonna try that 5000 because my local AutoZone has 5 quarts for 10bucks that comes with a Fram oil filter.