Originally Posted by 96Civic_Coupe
last time i change my oil (5w) it was pretty hot out, (...)now its really cold out and i was thinking of changing the oil to 10w 30
You're back asswards. Using heavier weight oil in the summer helps to keep a good coating on the parts, since it won't run off at higher temperatures as much as a ligher oil. That assures you better cold start lubrication. You use a lighter oil in the winter so the starter doesn't have to crank over thick, heavy, cold oil. This means quicker, easier starting.
10W30 summer, 5W30 winter.