Smelling "blowby", but does NOT use/leak ANY oil! ??

[86560SEL]

Hello again.

I have noticed for awhile now, on my way back into my neighborhood after driving 50-65 mph on the highway, I smell what smells like "vaporized" oil. Now, my car has 268K and it does NOT leak or burn any oil between the 3500 mile oil changes- which seems amazing for a 22 year old MB, with nearly 270,000 miles. I have drove up to 4000 miles before on one oil change, checked it and its completely full. So, I am wondering- whats this smell? Obviously its not burning oil since it is staying full, or it is so little, its not even noticable?

Perhaps something else in need of a change? Do these cars have PCV valves?

Thanks in advance!

[Monomer]

What....car.



The diesel's have an oil seperator and run the breather hose right into the intake manifold. No pcv valve.

[86560SEL]

Sorry....

The car is a 1985 Mercedes 380SE sedan (gasoline) 3.8L V8.

Thanks again.

[lkchris]

Look for valve cover gasket or head gasket leaking oil on the exhaust.

[t walgamuth]

ditto.

tom w

[MTI]

Another source of blowby smell is from the valve cover breather system.