What I've always worried about are the twin turbos that can really put a lot of heat on the oil. I don't flog the engine all the time but, do use the turbos for some fast starts from stoplights and wide open entrances onto the highway from about 30-40 mph on the ramp. With my forced air mods on the air chamber (see air intake-from where?), I do spin the thing right up there near red line often enough to think about that heat. Run 93 premium and like the way it performs. Never checked the mileage as the way I drive--it will be low and I don't care. So, I've been doing the changes at 5K or so. I buy'em and drive them off the dealer lot. Then 14-15 years (or more), later, when they are not worth fixing, winch them up on the ramp truck for the junkyard trip. I'm 77, have been a wrench since I was 14, so, yes, I remember the old days when we would build a high performance engine and run it down the road for about 30 miles on break-in oil and then change the oil and filter. And then, change it again at about 500 miles. You would not believe the amount of metal that would be stuck to the magnetic drain plug. In closing, it's whatever makes you happy that's important here; whatever you're comfortable with, and whatever you think you should do. We're all different and most likely will have different opinions on this and everything else in life. Regards. Honky.