How many months between oil changes?

[onlydarksets]

Originally Posted by jdlea

Well, at that high of a mileage I would probably try to get it done a little more often. At 75k I usually try to not let 4 months go by without fresh oil. Granted, my car only had a little over 62 when last I changed the oil, I started putting Max Life in it and those 4 months will be up soon, so I'll probably change it then.

What's the rationale behind 4 months? Seasonal changes? How many miles a year do you put on your car?