Oil came out gooopy!

[crazycrak]

I changed the oil in my 1998 Chevy S-10 2.2L this morning. I pulled the plug and noticed the oil (Mobil 1 HM 10w30) was very black and goopy for only 2600 miles I took off the oil filter (AC Delco PF47) and noticed the same thing in it very goopy didnt want to run out of the filter and even blacker. The magnet on the plug was very clean and only had very few shavings.
The oil almost looked like 80w90 running out

The reason I changed it is because I noticed it running very rought at idle which it has never done before and the last cold morning (58 deg. F) I started it it made some lifter noise. This truck is very picky with its oil

So I fill it up with Castrol Edge 5w30 and a WIX 51040 filter and it started up with no noise and ran smooth as glass it

The truck has been running Syn for the past 15K miles with two oil changes of PP 5w30 and M1 5w30 and the last with the M1 HM 10w30

 

[StevieC]

It's either you had a bunch of crud in the engine or possibly a coolant leak into the oil that is causing that tary goo. I would run a few short OCI's with a quality filter and a HM oil or Pennzoil Platinum and a 5K mile OCI and see what the results are.

Are you loosing any coolant?

 

[crazycrak]

No Loss of coolant since the waterpump went out

hows the cleaning power of the Castrol Edge?

 

[StevieC]

I don't have any experience with C.E. only Pennzoil Platinum and I know it is superb.

 

[addyguy]

How cold was the oil when you changed it? If the oil is fairly cold, it WILL come out very thick and dark.

 

[crazycrak]

Im gonna run this for 3000-5000 and do a UOA

 

[StevieC]

A good idea... Pay the extra and get a TBN/TAN analysis.

 

[crazycrak]

the engine was around 150 degs. F just warm from moving it around in the drive way

 

[tig1]

Obviously the M1 pulled a lot of sludge from your engine. That's it's job and it seems to be working.

https://www.mobiloil.com/USA-English/MotorOil/Oils/Mobil_1_High_Mileage_10W-30.aspx

 

[bepperb]

2600 miles?

There's got to be water getting in somewhere?

 

[Nickdfresh]

I used M1 10W-30 HM in the same engine and had no problems. It was relatively dark by 5000 miles though and of course Mobil claims it can clean and recommends 3000 OCIs for the first couple of changes in necessary...

 

[il_signore97]

Originally Posted By: crazycrak
I changed the oil in my 1998 Chevy S-10 2.2L this morning. I pulled the plug and noticed the oil (Mobil 1 HM 10w30) was very black and goopy for only 2600 miles I took off the oil filter (AC Delco PF47) and noticed the same thing in it very goopy didnt want to run out of the filter and even blacker. The magnet on the plug was very clean and only had very few shavings.
The oil almost looked like 80w90 running out

The reason I changed it is because I noticed it running very rought at idle which it has never done before and the last cold morning (58 deg. F) I started it it made some lifter noise. This truck is very picky with its oil

So I fill it up with Castrol Edge 5w30 and a WIX 51040 filter and it started up with no noise and ran smooth as glass it

The truck has been running Syn for the past 15K miles with two oil changes of PP 5w30 and M1 5w30 and the last with the M1 HM 10w30



Definitely do a UOA and look for signs of coolant ingestion.

 

[crazycrak]

I hope it was cleaning it out and not a coolant leak

 

[jstutz]

It dont take a lot of antifreeze to goop up and engine. i had that issue on my blazer and swore i was not using antifreeze but sure enough it had just been seeping in there and caused a film of muck all over everything. Never noticed it in the oil or anything untill a lifter started sticking. Just be careful.

 

[Bill in Utah]

Lets see. PP cleans up to 46% of sludge on the first use. You used it twice. Then went with Mobil 1 and then Mobil 1 EP all within 15k miles?

So that is 2600 miles for the HM which leaves 12,400 miles to do 3 OCIs.

4,133 miles per oil change and all of those looked ok? (ie no "gooopy" oil?)

I would say with about 99% certainty that it was doing no cleaning and you may have a problem.

Not to be downer but all these oil companies and their cleaning claims are getting real dumb.

Both Mobil and Pennzoil need to stop with the UP (UP being the WORD everyone with a brain should notice) to xx cleaning claims.

I'd change it out, WATCH the coolant level carefully (it take VERY LITTLE coolant to mess things up and once you have coolant in the oil I don't care what oil you are running you've got to change it out RIGHT AWAY)

When I was going through my head gaskets problem (both times) Terry said that no matter what oil you use, nothing will protect against coolant.

If anyone would know it would be him over any oil company.

I'd watch it carefully and maybe do a UOA if you start seeing anything going wrong.

Take care, Bill

 

[crazycrak]

Im gonna check the oil every few days now to make sure

 

[Pablo]

UOA.

 

[OVERKILL]

Does this engine use DeathCool?

 

[BuickGN]

I agree with the coolant theory. I've experienced it first hand even without the obvious milkshake.

 

[crazycrak]

Yup Dexcool but was flushed out at 85K when the water pump was replaced. Replaced it with Havoline Dexcool and topped it off with peak 50/50 anymake model green.

Yeah I had a mikeshake with my old ford festiva. It was in the rad. and engine