But will  most certainly increase the hassle factor if a problem
develops and will probly provide no actuall benfit to the eng.  KB

Of course not. That was not the point of my post. My point was that
while a lot of regulars on this group are aware of the Magnuson-Moss
Warranty Act, apparently a lot of service managers are not. Ford (and
all the other manufacturers) have their lawyers on call. Most
automobile owners do not. It is also the manufacturer's attitude that a
person will give up on getting warranty work if there is a little bit
of a hassle to it.
Case in point: I have a buddy who had transmission problems on a truck
(manufacture is not important here) that was still under warranty. The
warranty work was initially refused because of "modifications that
caused undo stress on the transmission". His modification? He had
replaced the factory wheels with aftermarket wheels, even though the
tire size had not changed. He got his warranty work done, but only
after spending several hundred on lawyer fees. His truck also had to
sit on the lot for two months because he couldn't drive it. He also was
doing monthly payments and insurance while the truck just sat on the
lot being unused.

Would the Oberg cause an engine to crap? Probably not, but a slick
corporate lawyer might easily have a jury to believe it.

Then would Ford default to honoring an engine-failure warranty claim unless
the Oberg system could be shown to have contributed to the failure?