Originally Posted By: TomB985
Looks like Jim 5 has a Chevy LMM 6.6L engine, which is vastly different from the Ford 6.4.
The 6.4 pulses the injectors during the exhaust stroke to raise the EGTs to regenerate the DPF. This causes unburnt fuel to wash the cylinder walls and some of it makes it past the rings.
It's almost worth removing the DPF simply for the sake of running longer OCIs than 5,000 miles. The Ford maintenance schedule still says OCI at 10,000 miles for regular use, but after seeing a blackstone report of 13% fuel dilution, very few of us will wait that long.
Agreed, and I'd love to remove that dpf and block the EGR. Except my truck has a 6 year 100k mile warranty that will be voided by a DPF delete. The 2007.5+ can tell if you've messed with the ECU's programming (needed to delete the DPF - cancel the regens) even if it restored to a perfectly stock program. It also records the number of regens against the number of miles and that would be out of whack as well.
I won't make it to 5k miles oci as indicated on the OLM. Right now it looks like the truck is calling for a 2k km (1,200 mile) OCI. The last one through spring and summer was 8,000 km when the OLM hit 0%.