- Joined
- Dec 11, 2023
- Messages
- 22
Hey all,
Longtime lurker, first post. For background, this is a 2014 Lincoln Navigator L 4x4 with a 5.4l V8 that I purchased a year ago from a dealership in Indiana, I live in North Alabama. It was purchased with 139k miles on the clock. Runs great and we use it to pull our camper which scales at 7300lbs loaded.
I’ve gone over the vehicle with a fine toothed comb and switched all fluids to Amsoil that could be. Both diffs, transfer case, transmission got a new filter and a 3x drain and fill, power steering, engine oil, brake fluid. Also performed a full suspension and brake system refresh along with new plugs, coils, air intake, coolant flush, new tires, etc.
I assumed the engine had gotten whatever bulk dealership/quick lube oil at OLM intervals for its entire life and wanted to start fresh. Used Amsoil Engine and Transmission Flush for 15 minutes and drained the old oil and replaced with Amsoil 5w-20 as spec’d at 145k miles and performed the UOA at 150k just to see where I was at. Ford manual recommends 5k OCI when towing also.
Towed from Huntsville to Tampa and back this past summer, so that is part of the 5k mileage on this UOA. My concern is the iron level of the UOA and the rapid depletion of the TBN in 5k miles. I’m not sure if remnants of the flush, the towing in 100 degree FL weather, or a combination of factors led to this. Only during towing did it suck down some oil, it hasn’t lost a drop except during that trip. It consumed 1 quart down to Tampa and 1 quart back up. PCV system doesn’t use a valve and has two hoses that connect from each valve cover to each side of the intake.
I took a pic of the inside of the oil fill port (the neck is long, sorry for the poor picture) and it looks like there is some significant deposit formation inside.
Please let me know your thoughts. Thanks!!!
Panda
Longtime lurker, first post. For background, this is a 2014 Lincoln Navigator L 4x4 with a 5.4l V8 that I purchased a year ago from a dealership in Indiana, I live in North Alabama. It was purchased with 139k miles on the clock. Runs great and we use it to pull our camper which scales at 7300lbs loaded.
I’ve gone over the vehicle with a fine toothed comb and switched all fluids to Amsoil that could be. Both diffs, transfer case, transmission got a new filter and a 3x drain and fill, power steering, engine oil, brake fluid. Also performed a full suspension and brake system refresh along with new plugs, coils, air intake, coolant flush, new tires, etc.
I assumed the engine had gotten whatever bulk dealership/quick lube oil at OLM intervals for its entire life and wanted to start fresh. Used Amsoil Engine and Transmission Flush for 15 minutes and drained the old oil and replaced with Amsoil 5w-20 as spec’d at 145k miles and performed the UOA at 150k just to see where I was at. Ford manual recommends 5k OCI when towing also.
Towed from Huntsville to Tampa and back this past summer, so that is part of the 5k mileage on this UOA. My concern is the iron level of the UOA and the rapid depletion of the TBN in 5k miles. I’m not sure if remnants of the flush, the towing in 100 degree FL weather, or a combination of factors led to this. Only during towing did it suck down some oil, it hasn’t lost a drop except during that trip. It consumed 1 quart down to Tampa and 1 quart back up. PCV system doesn’t use a valve and has two hoses that connect from each valve cover to each side of the intake.
I took a pic of the inside of the oil fill port (the neck is long, sorry for the poor picture) and it looks like there is some significant deposit formation inside.
Please let me know your thoughts. Thanks!!!
Panda
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