if you are looking for a magic potion from a can forget it, save your money,
sounds like possibly bad valve stem oil seals or the intake manifold plenum
gasket is bad..
NO: 09-05-00
SUBJECT: Spark Knock And Engine Oil Consumption Due To Intake Manifold Pan
Gasket Oil Leak
DATE: Feb. 25, 2000
This bulletin involves the replacement of the engine intake manifold plenum
pan gasket.

NOTE: THIS BULLETIN APPLIES TO VEHICLE EQUIPPED WITH A 3.9L, 5.2L. OR 5.9L
GASOLINE ENGINE.

SYMPTOM/CONDITION:
An engine intake manifold plenum pan gasket oil leak may occur on some V-6
and V-8 style engines. The oil leak is internal to the engine so no external
oil leakage will be present. Two symptoms of this oil leak condition may be
present. The vehicle operator may experience an engine spark knock during
acceleration and/or an increase in the amount of engine oil consumed by the
engine.

DIAGNOSIS:
Inspect the Positive Crankcase Ventilation (PCV) valve. Shake the PCV valve
to verify that the pintle inside of the PCV valve is free. Replace the PVC
if the pintle is not free.

If the intake manifold plenum pan gasket is leaking, an additional vacuum
source will be created inside of the engine at the location of the pan
gasket leakage. Engine combustion blow-by gases, oil vapor, and air from the
crankcase filter/breather may be drawn past the leaking pan gasket and into
the intake manifold. In most cases when this condition occurs, an engine at
idle will create the highest vacuum and lowest amount of engine blow-by.

 1.. Allow the engine to reach normal operating temperature.
 2.. Stop the engine.
 3.. Disconnect the breather hose from the air cleaner.
 4.. Attach a vacuum / pressure gauge to the end of the breather hose
(Figure 1).
 5.. Disconnect the PCV valve hose from the intake manifold.
 6.. Seal off the intake manifold PCV valve hose port opening.
 7.. Seal off the open end of the PCV valve hose (Figure 2).
 NOTE: DURING THIS DIAGNOSIS, IT WOULD BE NORMAL FOR THE ENGINE TO DEVELOP
PRESSURE WITHIN THE ENGINE CRANKCASE. THIS IS DUE TO THE NORMAL PROCESS OF
EXHAUST BLOW-BY GASES LEAKING PAST THE ENGINE PISTON RINGS AND ACCUMULATING
IN THE ENGINE CRANKCASE. DO NOT ALLOW MORE THAN 3 PSI (20.7 kPa) OF PRESSURE
TO BUILD WITHIN THE ENGINE WHEN PERFORMING THE FOLLOWING DIAGNOSTIC
PROCEDURE.

 8.. Start the warmed engine and observe the vacuum gauge.
 9.. Allow the engine to idle for approximately 30 seconds. Do not allow
more than 3 psi (20.7 kPa) of pressure to develop in the engine crankcase.
 10.. If the attached vacuum / pressure gauge does not indicate that a
vacuum is present in the engine crankcase, then the intake manifold plenum
pan gasket is good and no further internal engine vacuum leak diagnosis is
required.
 11.. If an internal vacuum leak is present then perform the Repair
Procedure.
 12..  Remove intake and install plenum gasket

Sir,
An engine with 139k miles will use some oil due to ring wear etc.   As I am
shure you are aware, blue smoke is oil and white is water.
I had a 318 cid ram that started showing those symptoms,
that is  small amounts of blue smoke when starting. It was leaking oil past
the valve stem seals.
The fix was to have the heads rebuilt, any decent auto machine shop will do
it.

Maxpower is also correct when suggesting not to use aditives. They indeed
are a waste of money and can actually leave deposits thruout the lower
engine and block passages.

Henry

 The fact that it smokes immediately upon start-up is your clue that
it's the valve guides/seals--replacing them is much cheaper than engine
rebuild.