WOT and Oil usage
I must say, being over here in Germany with my 2004 GXP and now having a little over 18,000 miles on the car, I am consuming less oil than I was before. Not sure if it is because I go at WOT once in awhile on the autobahn or just because the engine is finally breaking in a little bit but whatever it is, I'm glad!
I have been using synthetic oil since the first oil change and I change it according to what the DIC says is left percentage wise. I actually change it with about 15-20% of oil life left. The type of synthetic oil I use depends on what'* on sale. I think that the DIC works pretty well letting you know when it'* time to change. In the summer when I did alot of highway driving, the oil life indicator would go down slower than city driving which makes sense. But I also noticed the oil getting darker in city driving quicker and the oil life indicator reflected that. In other words, driving in stop and go traffic and short distances in the city was reflected on the oil life indicator dropping quicker than highway driving. I will not argue with people who religiously change their oil every 3,000 miles. If it gives you peace of mind and the cost is not a concern then it'* perfectly fine. I just think that if you use the oil life indicator you will not have a problem either. At least I haven't yet.