I've noticed a few references seemingly pointing out that it's only the '03 and beyond Cummins used in our trucks that are/will be rated for the 15,000 mile oil change intervals - and above, it was suggested that was due to better materials and technology used in those later engines... YET, here's what Cummins themselves claim for our current, existing 24-valve engines:
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"Let's talk durability, dependability and reliability. With an average life-to-overhaul of 400,000 miles*, the 24-Valve Turbo Diesel doesn't have to sacrifice anything to give you the performance and durability you depend on. In fact, this engine is backed by the same 5-year/100,000-mile warranty you've come to expect (warranty handled through your Dodge Dealer).
Dodge Ram has always been a leader in fuel economy, and we're working to make it even better. We didn't stop with the horsepower and torque - the maintenance intervals are longer too! Now you can run up to 15,000 miles between fuel filter changes and 7,500 miles before replacing the oil filter. The engine meets every 2000 Environmental Protection Agency (EPA) and California Air Resource Board (CARB) emissions standard without a catalyst or Exhaust Gas Recirculation (EGR). "
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SOOOoo - looks to ME as tho' we ALREADY have that 15,000 mile capability - at least according to Cummins!
Attention: TDR Forum Junkies 
