300k miles NAG1 service

220629

Well-known member
For those stumbling upon this thread and looking for a reasonable transmission OCI Oil Change Interval...

I believe that I can safely add that the general consensus on this forum is a 40 - 60,000 mile OCI for the transmission. One caveat is that the general consensus also requires that the fluid change includes both a pan drain and a torque converter TC drain. A pan drain only probably will not support the 60,000 OCI depending upon the service a vehicle needs to provide.

Given my generally not too severe service seen by my T1N's, 60,000 miles is my trigger. Some commercial RV conversions tend more toward the 40,000 mile OCI. The 60k miles transmission OCI works fine for most Sprinters.

vic
 

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