Wow, a lot of good reading, thanks! Looks like I'll be using the OEM filter for sure, just not sure on oil I'll probably stick with the Castrol, hasn't failed me yet. I'm a bit surprised at the oil change intervals though. I've always done them right at or right above 3k miles. I don't know that I'm brave enough to go 7500, but I'll probably change every 5k miles using regular oil (non synthetic). Where are you getting your filters? I've got a hookup with one of the dealers in the state, but they are 2 hours away and I don't feel like driving down there just for some filters. I'm like you though, I'll stock up when I get them.