[joshbarnett]

This is the first oil change on a truck I recently bought. The oil is Valvoline high zinc racing oil according to the previous owner. I don't believe I have ever seen oil this bubbly. The truck has sat for a few days and the oil was literally cold when I drained it, so I am not sure if that contributes to bubblyness. But my concern, of course, is there is coolant or fuel in it. Would love to hear some opinions.

Looking at it closely, I can see that those micro bubbles are popping at a high rate.

 

[RWENUTS]

Woah!
Looks like something my cat pukes up.
Wonder what type/kind of coolant that is?

 

[joshbarnett]

Woah!
Looks like something my cat pukes up.
Wonder what type/kind of coolant that is?

By the way, after sitting for about 10 minutes, it completely clears up (I assume the bubbles all pop). Now looks just like every other oil I have changed.

 

[Moosecountry]

put a pressure tester on the rad and start engine

 

[2old2fast]

put a pressure tester on the rad and start engine

Hope he puts oil back in it first !

 

[BogiesAnnex1]

Just wondering that if you didn’t run the engine to warm the oil prior to draining and you say the bubbles disappear rapidly, then aside from dribbling in the drain pan there doesn’t seem to be a persistent cause???

Bogie

 

[joshbarnett]

So yeah the bubbles were gone quickly and after a while the oil looked like regular spent oil, but look this stir a few hours later.

New video by Zarif Alimov

photos.app.goo.gl

 

[RWENUTS]

It’s water.
Source unknown.
Likely cracked head, block or head gaskets, or intake.

 

[2old2fast]

How about slow running cold oil dripping from a distance ?

 

[Eduramac]

Woah!
Looks like something my cat pukes up.
Wonder what type/kind of coolant that is?

Definite Cat Puke.

 

[RWENUTS]

Just wondering that if you didn’t run the engine to warm the oil prior to draining and you say the bubbles disappear rapidly, then aside from dribbling in the drain pan there doesn’t seem to be a persistent cause???

Bogie

it’s the normal oil over water scenario bogie.
sitting cold the water gathers in the bottom of the pan With the oil above it.
instant cat puke when you start to drain it.

 

[stevenallee5]

Probably condensation. How far or long (time wise) was it driven before changing oil?

 

[johnsongrass1]

Nothing to worry about. Overthinking it. It happens a lot. Continue as you were.

 

[joshbarnett]

Probably condensation. How far or long (time wise) was it driven before changing oil?

It sat for about 3 days prior to changing oil.

As an experiment, I stirred the drained oil thoroughly and put a portion of it into a class container to leave overnight. @RWENUTS, shouldn't the coolant have separated at the bottom of it in the morning? I didn't see anything of the sort though.

 

[RWENUTS]

I see it as water/coolant but others say forget about it.
So I’ll join the crowd and ignore it too.
onward!

 

[Eduramac]

I see it as water/coolant but others say forget about it.
So I’ll join the crowd and ignore it too.
onward!

May not be necessary but send out a sample see what exactly it is. Peace of mind.

 

[BogiesAnnex1]

it’s the normal oil over water scenario bogie.
sitting cold the water gathers in the bottom of the pan With the oil above it.
instant cat puke when you start to drain it.

No, water and or coolant mixes in oil looks like and stays looking like chocolate mousse. This has something heavier entrained which looks to be fine metal as a powder. This can be a lot of things but usually is either a failing bearing or cam lobe and lifter material.

My suggestion is send a sample of that oil as stirred to get the whatever into it off to an oil analysis lab. Could be the oil chemistry is separating but that’s damn low on my list. My quick and dirty method would be to stir it with a magnet to see what sticks bearing material won’t but lobe, lifter, and other ferritic hard part material will.

Bogie

 

[joshbarnett]

No, water and or coolant mixes in oil looks like and stays looking like chocolate mousse. This has something heavier entrained which looks to be fine metal as a powder. This can be a lot of things but usually is either a failing bearing or cam lobe and lifter material.

My suggestion is send a sample of that oil as stirred to get the whatever into it off to an oil analysis lab. Could be the oil chemistry is separating but that’s damn low on my list. My quick and dirty method would be to stir it with a magnet to see what sticks bearing material won’t but lobe, lifter, and other ferritic hard part material will.

Bogie

But this is the very first oil change after the engine was built. Wouldn't you expect there to be some fine material as the lifters and cam are wear mated?

 

[ericnova72]

But this is the very first oil change after the engine was built. Wouldn't you expect there to be some fine material as the lifters and cam are wear mated?

Now what I saw in your stirring video makes sense....that almost dust-like gleam stirred up is moly paste(cam lube) along with shed metal fine material from the rebuild.

It's normal 0n a fresh engine.

 

[RWENUTS]

But this is the very first oil change after the engine was built. Wouldn't you expect there to be some fine material as the lifters and cam are wear mated?

Cut open the filter.
Should be some residue in there too If it’s indeed the first oil change.