Your maintenance program is working well. That differential looks great inside.
I removed the cover from the 9.5” differential in my suburban last summer and it looked nothing like yours. The oil looked more like crude oil than gear oil, and the magnet was 3x the normal size because of all the...
I suggest 5w-30 or 10w-30 "High Mileage" oil. The high mileage oils tend to be a bit thicker for a given viscosity grade, and have some seal conditioners that can be helpful for an older rig. I notice reduced oil consumption when I switched my 97 Suburban over to a high mileage 5w-30, and it...
Nice overview. I ran Pfsense (and OPNsense briefly) for a few years on a Dell Optiplex. Both were very stable, but I found the Pfsense documentation to be more thorough.
To maximize the amount of time my UPS can keep my internet connection online during a power outage I looked for a less...
Your results are not ideal, but don’t panic. Do you know how long the oil was in service? It may have had a bunch of short trips.
Enjoy the car and pull a sample on the next oil change.
I think corrosion is more of a concern for vehicles that get parked for months at a time, especially in a damp environment. If your cars are parked inside and driven monthly that is a lot better than something being parked all winter in the Northeast. Z-Rod is a great oil, but its value for your...
Your dads engine actually has it easier than a truck that just gets short tripped around town. He should be able to get a pretty long OCI of that 0w40.
What fluids are you running in the rest of the drivetrain?
This truck may have had many short trips in its life. Just driving it at operating temperature will probably help a lot. As for the MMO, the solvent flashes off pretty quickly, so 1000 miles probability isn’t any worse than 500. Cutting open the oil filter after 1000 miles will give you a good...