Originally Posted by whunter

1985 300SD.

Used Rotella T for the last oil change.
Now I have burnt oil stink.
At 1300 miles 1.75 quarts low.
The oil looks like oil well drilling derrick sludge in Texas.

I have been running Mobile 1 15W-50.
Last oil change delayed due to emergencies.
At 6280 miles it was not a drop low on oil.

The oil gets changed this weekend, back to Mobile 1 15W-50.

This is a mad as H**L thread, with oil involved.