Oil filter change vs oil change

You need to consider how a vehicle is driven also. Lots of short trips and the oil will degrade a lot faster.

I have a 5.9L in a 2001 dodge ram that I regularly take 60 miles to work and back. It has 210,000 and still has 40-60lbs of oil pressure. I've had it over 10 yrs and change the synthetic blend oil every 5,000-6,000 miles.

Now if it would just get better than 12mpg!!