Well, after 320,000 miles, it may have finally given up. I was on my way home from work when my 850 lost all power. Got it off onto the shoulder and into nuetral before the car died. When I tryed to crank it over, it turned over 3-4 times and then went totally dead. Tried this a couple of more times with same results. When I opened the hood, I saw that oil had bee pushed out of the engine through the filler cap. There is still some oil in the pan, but not where it was or should have been. While getting it over to the side of the road, there was NO smoke or overheating of the engine. Suggestions? Loose a valve? Is it worth rebuilding? Ran better and quiter that my '90 740 or my '98 Dodge Dakota. Really need to get up and going again. Miss having this fun car to drive to work. Any ideas as to where to pick up a good low mileage engine around Minnesota direction? Let me know.

well it doesnt sound ceased or anything. and doesnt sound like you are in in too much trouble. the car still turns over. Replace the oil cap and change the oil. Flametrap if non turbo. Check all ignition electricals such as spark splugs rotors distributer and so on. check fuel pump relay. check any codes that might have come up.
Good luck.. sounds like a blown gasket on the valve cover.

Sorry for not getting back to you sooner on your question/comment on my 850. I purchased the car in September or so with 309000 miles. The car is in very good condition with only slight work bodywork needed on the left side. Previous owners had a slight mishap that will require some fender & drivers door cleanup.
The car died on me as I was on my way home from work. I drive 45 miles one way to/from work in Bloomington, MN. Car was running fine at 70 mph. Just lost power. Pulled over to side of road and noticed oil on engine. Had it hauled home so that I could look at it in a safer location than on the Interstate. Posted the problem on the brickboard for suggestions. Got a response from the Netherlands that the issue may not be as serious as thought. Pulled the Flame Trap off, cleaned and reinstalled. The engine also seems to have a safety feature for oil level, shuts the engine down. Added oil and it took right off. No problems with engine noise or knocking, etc. Quieter than the '90 740 that I had running next to it. It ran for 20 minutes, revving up to 4-45 M rpm. When I put it into gear to take home, engine died and wouldn't restart. Had it taken in for computer check. Checked compression and 2 cylinders had no compression when dry.
#1 - 140 dry
#2 - 150 dry
#3 - 100 dry 165 wet
#4 - 160 dry
#5 - 80 dry 100 wet
removed and replaced plugs, checked dist. cap and rotor. Engine started.
Fuel pressure -37-45 psi Volume OK Passed leakdown.
Computer codes 130, 135, 400 sensors need to be replaced
Oil leak coming where the distributor bolts onto the head. Camshaft seals will need replacing. Oil leak was likely cause of engine killing as oil was forced into the distributor cap.

I have to replace the items listed above, but the car is running again, although there is an oil spot under the car that never used to be there. Will have to get the parts ordered and installed so that I can add another 150-200 M miles.

Thanks for you input.

could be as simple as a oil return passage has clogged up and the motor flooded the head with oil...but at that mileage, it may be the end. BTW were you running dino or synthetic? I ask because all the synthetic worshipers claim you can only get this far with synth.

I would check ebay or a junkyard and bet you could find an engine with about 80K on it for $600 and be on your way.