I changed the Fuel Filters (main and prefilter) on my 85 300D the Wednesday night. While doing so I tightened some connections, messed around in the engine compartment moving lines and wire around and admired my recent A/C and HVAC rebuild on the car.

Thursday morning I noticed a plume of smoke coming out my exhaust as severe as the worst I've seen--you know, you come up to an intersection and you see an old car blowing a plume of smoke that literally duplicates an engine fire, and you tell your daughter, "thats what happens when you dont maintain your engine, that car will be dead by tomorrow"---I never thought it would happen to me, since I'm a maintenance freak and the engine doesnt lose a drop of oil between engine changes...I thought the fuel mixture was overly rich or something--didnt dawn on me it was my Oil!!

200 miles later when I got home I noticed the engine knocking. Tired,and suffering froma terrible fatigue lately... I didnt pay attention, I figured it was time to clean the injectors, retime the pump, it didnt occur to me that my oil was down to probablydown to 1/2 a quart.

Today I woke to do the repairs. Thats when I noticed my Oil pressure at 0 bars! I checked!! All the oil was gone. Its true I rerouted some hoses on top of the fuel filter when I changed it, but I did nothing else.

I have the car back to running normal, but I was only able to duplicate the condition briefly this afternoon by crimping the oul breather hose on top of the valve cover--Is that what might have caused this? I run a staright piece of 5/8 inch tube from the valve cover to the nipple on top of the air filter it hooks up to to eliminate that oily mess this connection generates.

1) What caused this oil loss? Could a crimped/restricted oil breather line cause this?

2) I made it home literally on the last drop of oil. I couldnt believe I started the car today several times and idled it on no oil. I cant believe it didnt sieze right there.

This car has been great until this incident..
85 300D. Sudden oil loss (7.5qts) after fuel filter change out---Why?

?Was the breather line crimped?

?Have you refilled the oil and checked for leaks?

?Have you repeated the test drive with the same results?

This and other info may help in the diagnosis.

__________________
Paul