Chocolate Milk Oil?

[Poopsicle]

I just performed a 30,000 mile maintenance on my sister's car. When draining the oil, the oil came out as chocolate milk. My sister is a kind of person who always bring her car to Jiffy Lube and she always used the FRAM and cheap oil. I used Semi-Synthetic and an OE Hyundai oil filter.

This same thing happened to my bro's 2001 VW Jetta 1.8t. I use Mobil 1 in his car and when draining oil after 3,000 miles, it's like chocolate milk coming out.

On my 1998 Hyundai Tiburon FX, the oil comes out normal; pure black with a hint of clearness.

Is the Chocolate milk a sign of sludge or something?

[2loud2k2xd]

might be oil/coolant mix.

open the radiator cap (cold) and see if theres anything floating inside.

[LAMRONH]

Does it taste like chocolate milk?

Seriously, this sounds like something for a skilled shop to look at.

[jayupark]

Do she have an oil catch can? I did not empty mine out for a really long time (about 30K miles) and started to notice a bit of the brownish/milky crud on my oil cap. It was overflow from the catch can getting back into the system. Looks a bit like chocolate milk.

Coolant is a very possible option though.

[CornbreadXD]

its either coolant but not too likely if the car only has 30'000 miles on it but more likely to be moisture in the engine. did you let the engine warm up before you drained the oil or was it done early in the morning when the temp is at its lowest?

[only1db]

a lighter color is almost always coolant present in the oil.

what does the top of the oil fill cap look like? a picture would help.

[Poopsicle]

The top of the Oil has no signs of millky residue. The dipstick has no signs of milky residue. The car didn't lose any coolant either.

[cclngthr]

a lighter color is almost always coolant present in the oil.

what does the top of the oil fill cap look like? a picture would help.

My HD showed some lighter color oil on the dipstick, but what came out was darker. Possibly moisture in the system since I don't drive it much.

[Poopsicle]

Could it be constant stop and go driving that's creating the moisture? She lives in New York City where 99% of the time, it's stop and go.

[cclngthr]

Could it be constant stop and go driving that's creating the moisture? She lives in New York City where 99% of the time, it's stop and go.

Likely.

Last freeway long drive my car saw was in December. My trips are generally stop and go.

[DJ Hellfire]

Sounds like moisture. How old was the oil? Remember, it's 3k miles or 3 months, which ever comes first, not 3000 miles in 6-8 months and then change it. It there was coolant in it, it would be more thin, and watery like.

[only1db]

either way there is something in it...i would go to a semi synthetic if i were you.

just keep and eye on it.

[2003GT]

Whats the Over Flow can does my car have one. BOB

[danofthejungle]

my opinion is coolant
Working at my garage, I saw that a couple times. Especially one car where the passageways for the coolant in the intake manifold melted/wore through, and the coolant hydrolocked the engine. Funny thing is, it was a common problem, so they already engineered a "fix": a plastic bushing that fit in place. Kinda stupid when the intake manifold is plastic too... Anyways, the coolant got past the cylinders too and everything was a "chocolate milk" colour.

I use cheapo filters and oil for my hyundai, but never had a problem like that. Like lamronh said, I think it's something you gotta take it into a shop for

[Poopsicle]

I did an oil analysis, no coolant was found in oil. Mechanic said it was massive stop and go driving of New York City hell.

[KeWLKaT]

Well we don't have coolant passages in the intake manifold, so that rules out that option. The only way you would be able to get coolant in there is if you have a blown head gasket.

[steev-o]

Sounds like moisture. How old was the oil? Remember, it's 3k miles or 3 months, which ever comes first, not 3000 miles in 6-8 months and then change it. It there was coolant in it, it would be more thin, and watery like.



That still amazes me every single day. Americans change their oil every 3000 miles or 3 months. My dad never ever switched out oil. Topping off yes, but never ever did he drain the whole pan and filled it up again...

idk why u guys do it so often.

difference between diesel and petrol engine?:confused:

[Poopsicle]

^^ Not all Americans.

I think 3,000 miles is a waste of oil. My brother and sister are in the "change at 3,000 or your car will blow up", Hype.

I change my oil every 5,000 miles in the Fall, Spring, Summer and 7,500 in the winter time. My car has a billion of miles and still running awesome from proper maintenance.

But I guess it's better to change it earlier, plus we can do this because our oil is so cheap compared to the Netherlands. I heard that Netherlands fuel is like $7.00 a gallon!!