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I have a little different outlook on this. I do respect those who differ in opinion, so this is no criticism of them. I change my oil between 8000-10,000 miles. I drive at least 25k miles per year. I know Ford says 5000, I do not care what Ford says because they do not even make the darn engine. IMO Ford has done nothing to better any of the diesels they buy from IH, from the 6.9 to the 6.0. IH says this engine is designed as a medium duty diesel. IH recommends oil change intervals of 10,000 miles in severe duty applications as defined by medium duty standards. Our light duty chassis can't perform severe duty service for very long as it is defined by medium duty stds. So I feel just fine changing my oil at the intervals stated above.
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While at a gross level that might be true you have to remember that there is a trememdous difference in how that same basic engine is actually implemented in the PSD vs. the IH trucks. The IH version IIRC is set up to run a lower HP relying on the torque and gearing to put the power to the ground at a much lower RPM than the PSD implementation. Over let's say that 10,000 mile interval for an engine in an IH truck our engine has turned revolution wise ... read that as "wear" on the oil ... a BUNCH
more RPMs and thus has produced more wear and more strain for lack of a better word on the oil in the engine. Does this equate into a halving of the oil change interval ... probably not, but I also don't think you can compare the two directly /ubbthreads/images/graemlins/shrug.gif
Finally, not many IH trucks have things like "flip chips" aftermarket programmers where us PSD owners are continuing to try and suck that last HP out of an engine that was designed for a much lower HP output.
Just another take on this PSD vs. IH comparison that you might want to consider.
Larry, keeper of the <font color="red"> New revised </font><font color="blue">"little secrets" </font> CLICK HEREhttp://forums.thedieselstop.com/ubb...73329&page=0&view=collapsed&sb=5&o=31&fpart=1