FCA Receives Certification for EcoDiesel

jus2shy wrote:


The only plus oil change wise on the Ecodiesel is that it's 10k miles or once a year. Cummins is 15k miles or every 6 months (twice a year). I maintain the twice a year oil change for the time being since I'm under warranty. I do drive 80% city too, so I'll probably keep that interval, I do severe duty changes on all my fluids due to stop and go conditions.

This has been a discussion topic a few times when I get together with my old friends that I used to work with at Cummins. Those of us who actually tested these engine never understood why Ram chose to always to post 6 month interval when that was only recommended (per Cummins) for vehicles who idle a lot or their duty cycle was at low speeds. For all other applications for the 6.7L with duty cycles that included highways speeds (like the recreational vehicles in the chart from Cummins Quickserve below), then the interval was 12 months rather than 6 months. We just concluded that Ram was just trying to play it safe even though the duty cycle that most Ram owners utilize their truck in require 12 months in other 6.7L applications.