In terms of Ford, and specifically Ford's honoring of their warranty, using an oil other that what they recommend should be a legitimate concern.
Of all the manufacturers that I have had personal experience with, when it comes to warranty claims, Ford is the worst. It seems to me that Ford tries very hard to find a reason NOT to do a warranty repair, and they will flatly refuse to do any kind of "good will" warranty repair.
Case in point, I have a friend who owned a 2004 Explorer, in the fall of 2006 when the 36 month or 36000 mile warranty had just expired (on time), with 21000 miles on it the timing chain broke. The warranty was 14 days past the 36 month expiration and Ford flatly refused to do anything about it, even though it had been meticulously maintained and he had documented proof. Needless to say, he will never again purchase a Ford product.
To the OP, be careful with Ford and their warranty.
Of all the manufacturers that I have had personal experience with, when it comes to warranty claims, Ford is the worst. It seems to me that Ford tries very hard to find a reason NOT to do a warranty repair, and they will flatly refuse to do any kind of "good will" warranty repair.
Case in point, I have a friend who owned a 2004 Explorer, in the fall of 2006 when the 36 month or 36000 mile warranty had just expired (on time), with 21000 miles on it the timing chain broke. The warranty was 14 days past the 36 month expiration and Ford flatly refused to do anything about it, even though it had been meticulously maintained and he had documented proof. Needless to say, he will never again purchase a Ford product.
To the OP, be careful with Ford and their warranty.
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