[JimA]

I have a 2007 5.9. The owner's manual has the following maintenance schedule.

Oil, filter, etc Schedule A: 15,000 miles. Schedule B: 7500 miles.

The 'Warranty Information book, also from Dodge has the following.

Oil, filter, etc. Schedule A: 7500 miles. Schedule B: 3750 miles.

Question- Which is correct, and why do they disagree, as both are published by Dodge and both are supplied in the new owners, packet.

Thanks