Hi guys. Thanks for taking the time to post with your thoughts and advice.
Yeah, I have an extended warranty. 7 year Premium Care, good to 150,000 kilometres here in Canada.
As you guys suspected, I plan to change the oil out axactly as Ford specifies in their severe duty maintenance schedule - every 5,000 km (3100 miles).
That way, the really can't say anything if the engine blows.
I do realize that modern engine oils can indeed go over 10,000 miles between changes, and maybe just maybe if I were keeping the car many many years would I switch to longer drain intervals with a synthetic once the warranty had run out.
Otherwise, it really is not to my advantage to pay substantially more per oil change at 3000 or so miles with synthetic.
Anyways, I got the dealer to replace the 5W20 the poured into the crankcase last week. The 5W30 dino oil went in Saturday, and will stay in there about 3.5 months or 3,100 miles, whichever comes first!
Theres been numerous tests done here in the CEG by people who've sent their oil in to be tested and every result has come back showing oil life after "extended stay" in the motor, more proof that letting it stay in ones car isn't going to hurt anything. I think I'm very well qualified to speak about preventive maintence, seeing that I take care of the vans at my work with the following stats:
) The radiator lasted 350K and the original w/p went 329K, its all about preventive maintence!
Radiator and w/p are still original 
