I have noticed that my 300d is a little shakey at idle. I notice it most on 100% #2 diesel. I ran out of fuel today on my trip and went into survival mode to get to a fuel station. I dumped what I had into the tank to get me to the station. I had 1 gallon of 10w-30 and a qt of trans fluid. Anyways, that worked great! But here's what I noticed... It instantly smoothed out. Then I filled it back up on diesel and it's shakey again. It's not an audible miss but I can feel a pretty good shake while sitting at a stop sign or in park.

Is this normal? Is my IP worn? Why did it run smoother on the motor oil?

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-E300d '99 350k
-Suburban '93 220k
-TDI Jetta '03 350k
Sold
-F250 '96 7.3
-Dodge Ram 12V
-E320 '95 200k
-E320 Wagon 1994 155k
-300d Turbo '87 187k miles
-E320 1994 200k
-300d Turbo '84 245k (sold to Dan62)
-300d Turbo '84 180k
-300sd '80 300k
-7.3 Powerstroke Diesel 15P Van 500k+ miles
-190d '89 Non Turbo 2.5 5cyl 240k (my first MB)
Tom's Imports of Columbia MO Ruined the IP in changing leaky delivery valve O-Rings - Refused to stand behind his work. Mid-MO MB drivers-AVOID Tom's.