I found a filter and Rotella-T 15-40 locally so i did that yesterday.
The oil I drained didnt look too bad but I love to start with a baseline of fresh fluids all around.
I will order some redline and a filter with my stack of other items.
Changing the oil is always easier with the airfilter housing off, and I wanted to look around and check stuff too.
In doing this I found a vacuum nipple on the front LH side of the intake manifold exposed and sucking air... took me a while to find the pipe that should have been connected and Hey Presto, the Vacuum locks are working again!
I pulled out the plugs, they are the correct non resisters, so clearly someone knew what they were doing at it last service!
Here is how they looked... no deposits from Oil burning I have seen in the past on M103's!
They are in order so note the #1 plug is an odd one because someone had taken it out, and we could not find it.
Here is how they look:
The Plug leads look brand new, so I will strike that from the list for now. The OVP looks fresh as well.
After changing the oil I sat and listened to the engine at idle... its the smoothest M103 in our fleet, and I bet I can balance a quarter on the valve cover!
One thing I did spot is cracks in the front shock mount rubbers... so adding those to my shopping list!