Fully agree on having a device to monitor engine running parameters on the 6.0.
Scan gauge II installed and also carry my automotive scanner (Not top of the line but good enough to allow to monitor real time data ).
Alternator - FICM.- Had an issue with the alternator 2 years ago, had no problem with the FICM or injectors but the truck was letting you know something was wrong and protected itself from variable voltages and turned on the wrench light in the dash..
Oil - Synthetic seems to be the best you can do, maybe based on the amount of shear the oil puts in the oil due to the injection been actuated by the high oil pressure. If I use regular oil I will get a couple of codes related to ICP sensor, (which is brand new as well as IPR) switch back to Amsoil and the problem goes away and guess what mileage improves significantly.
Have the dual Amsoil filtering system which is great but once after many many miles of off road driving the oil filter became loose and lost all oil in the middle of nowhere (Desierto de Vizcaino Baja Mexico), since then I check my filters periodically and carry decent amount of oil and replacement filters for oil and diesel.
Diesel additives.- additive in diesel does not seem to make much of a difference, additive in oil makes a big difference. Use both as a safety net..
Fuel Injectors - About where I bought the injectors, it was after a lot of searching on line, but the purchase was made on the phone. I think it was Accurate diesel, spent some time on the phone with them and they were quite helpful. Do not have the details with me ( In Baja at the time) can check back later, invoice was paper not electronic.
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