I run 125 miles daily back and forth to work, 85% Interstate, 10%secondary, the rest back road. My wife runs the same distance every day. Our son drove our vehicles for 5 years. My vehicles get fresh oil and a new Fram filter every 3000 miles. They get a new Fram air filter every 6000 miles. Since 1989, I have had:
1989 Escort 276,000 miles (purchased new, sold in 2000)
1990 Ranger 283,000 miles (purchased new, sold in 2003)
1995 Escort 212,000 (purchased new, sold in 2003)
1995 Escort #2 98,000 and still going strong (33,000 when purchased)
2000 Cherokee 94,000 and still going strong (34,000 when purchased)
1996 F 250 120,000 and still going strong (100,000 when purchased)
That's 916,000 miles on Castrol & Fram. Of course, most of those miles are at turnpike speeds. I sell my cars when the fuel economy drops 15-20%, so there isn't a whole lot of life left in them. Still, I'm open to logic.....what's wrong with Fram?