90 Astro-Oil looks like a milkshake!! Help!

[shroom59]

Hey today i told my kid, eh put some oil in the van, so he went and grabed the 5qt gtx , which was a little over half full and emptied it in, well got down the road a quarter of a mile and was blowin smoke like mad, blue smoke, well turned around and notice it had turned whitish and sometimes blueish, well drained the oil, at first it came out like worn black oil, then after half a pan it looked like a greenish brown milkshake consitantcy. And to top things off, i fill the oil pan not only once, but over half the second time, it had 8.5 qts in it. Well i put 4 qts back in and then started it up, bluish smoke again then white smoke every so often and a loud bangin on the right side. Well i also for the heck of it disconnected the exhaust at the "Y" cause it was leaking and man was it, i was getting a slimy liquid out of it, like a spray every so often, this does not look good, i am thinking a blown headgasket, at the very least perhaps the intake gasket went bad on the backside that blocked. well any help would be greatly appreciated.
I was loosing power too, you could hear like a racing noise, like drumsticks tappin away rapidly while i accerlated.

[Blue Bowtie]

Time for a cylinder leakage test, and if that doesn't reveal anything, a cooling system pressure test.

[JTKESSLER]

you have a blown head gasket

[old_master]

A head gasket would have to leak in two different places to allow coolant into both the combustion chamber and the crankcase. This would also allow combustion gasses and pressure into the cooling system. If that were the case, you would experience overheating, and excess pressure in the cooling system until a hose, the radiator, or heater core blew apart. It is highly unlikely that the head gasket is the culprit if you’re not experiencing these other symptoms. A leaking coolant passage in the intake manifold gasket would allow coolant into the crankcase and the PCV system would suck the vapor into the combustion chambers causing white exhaust smoke. Excess coolant in the oil will also cause a "milkshake" substance to form on the underside of the oil fill cap. As Blue Bowtie mentioned, a cooling system pressure test and a cylinder leakage test will confirm what the problem is. Leaking intake gaskets are a common issue with the 4.3L engine, head gaskets are not.

[JTKESSLER]

you probably are correct i did have this problem once and it was a head gasket ,i would do as he states i know he knows wayyyyyyyyyyyyyy more about vechiles than i do.