What causes my F350 to leak oil. It leaves a puddle of oil everytime I park it.

What is your question?

I've heard I need to pull the motor to replace a gasket. It's 6.7 liter diesel with 207,000 miles. Been a great truck but it's just dripping oil constantly.

What makes this problem better or worse?

It's getting worse. I just keep adding oil

How long has your 2012 Ford F-350 Super Duty had this problem?

At least 6 months