OCI for Delvac 1 in 6.7 Cummins

[oliver88]

Anyone care to approximate a safe OCI for Delvac 1 5w40 in a 2008 Dodge Cummins 6.7 liter? Truck is towing 10-15,000 pounds always. I will pull a sample at 7500 miles. This engine (as do all new diesels) has an EGR and DPF so soot loading could be a concern.

 

[2rowdy]

When mine was stock I was going about 6500 - 7500 miles per oil change. The soot is a concern but not near as much as fuel dilution. So check you oil frequently. I added a fs-2500 bypass filter and am now running Schaeffer's supreme 9000 5w-40 and I change the bypass filter at 10,000 miles and a complete oil change at 20,000 miles. I should add that I am now fully deleted. No egr/egr cooler and a 4" tbe.