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AnthonyG 01-16-2019 02:59 PM

Dark brown gravy for oil
 

Just getting around to changing the oil in by 8BA after last season. Tried to start to heat oil up before oil change but battery low so turned fairly slow & wouldn't start. Tried priming and choking for a while & figured i had it flooded so let it go for a couple of days & charged the battery. Second try 3 days later fired right up let it get to 150 shut down and drained oil. Noticed it was like dark brown gravy. didn't smell antifreeze but did smell like over rich exhaust. Made me recall the exhaust smelled pretty rich even after running a bit. Can gas in the crank case cause the oil to get dark brown and a bit creamy or just water? I've had a few blown head gaskets in my history but always was a lighter color creamy brown like chicken gravy or lighter. Thjoughts?

51 MERC-CT 01-16-2019 03:04 PM

Re: Dark brown gravy for oil
 

Sounds normal to me :confused:

AnthonyG 01-16-2019 03:35 PM

Re: Dark brown gravy for oil
 

Maybe. I did run it a lot more this season. Normally change at the end of each season as I don't run a filter. I've done 5 or 6 changes since build & just thought it looked different. Usually black and thinner consistency. Guess I'll go ahead with the change and check again after running a bit just to make sure.

Talkwrench 01-16-2019 06:57 PM

Re: Dark brown gravy for oil
 

Probably haven't run it enough.. Makes sure its at operating temp when you dump it.. Then wait for it to cool down a little and jamb your finger up in there and have a good feel around, see how much sludge you got ..or metal if things aren't what they should be :eek:

J Franklin 01-16-2019 07:10 PM

Re: Dark brown gravy for oil
 

No filter means you need to change more often.

Oldbluoval 01-17-2019 04:20 AM

Re: Dark brown gravy for oil
 

My experience has been water in the oil.
Head leak or worse crack somewhere

flatheadmurre 01-17-2019 04:46 AM

Re: Dark brown gravy for oil
 

Short trips when engine donīt get up to full working temp for an extended period can give you condensation with sludge as result...so before fearing the worst change oil and take it for a long nice drive.
I see this alot on modern cars to that just drives 10min to the mall and back.

Frank Miller 01-17-2019 08:12 AM

Re: Dark brown gravy for oil
 

The water temp does not equate to the oil temp. You really need to drive it for about 20 minutes to get it up to temp.

Gene1949 01-17-2019 08:28 AM

Re: Dark brown gravy for oil
 

Frank Miller X2

I'm guilty also. I've had carb gasket issues (shrinkage) until I start them once a week for about 10 minutes and then the following week the 20 minute drive.

The Ford with the 4GC isn't too bad but the 69 Camaro with the Demon (Holly clone) is really susceptible to gasket shrinkage.

JSeery 01-17-2019 09:19 AM

Re: Dark brown gravy for oil
 

Anthony, I don't remember, are you running thermostates? Any engine needs to get up to a high enough temperature to remove the condensation out of the oil. A lot of starting the engine up and running it for a short time so it doesn't get up to a high enough oil temperature can result in a build up of condensation in the oil.

AnthonyG 01-17-2019 12:13 PM

Re: Dark brown gravy for oil
 

Thx, even though I been working vehicles 4 yrs not so much on Flatty’s. Only have the one & hasn’t needed much since installing in my ‘35. Always good to hear from experience @ FB! Let oil drain with plugs out for a few days to air out. Probably change tomorrow along w aluminum powder sealer Kube suggested in another thread for sealing up minor internal coolant leaks. Then weather permitting take a long drive! Checking oil along the way.

AnthonyG 01-17-2019 01:00 PM

Re: Dark brown gravy for oil
 

Any recommendations on which to use aluminum powder base, copper powder base or Barr’s has a new carbon fiber base internal coolant sealant?

philipswanson 01-17-2019 01:08 PM

Re: Dark brown gravy for oil
 

Run a good synthetic oil like Shell Rotella or High Mileage Mobil I. Change as often as you need to keep the oil clean. You should be able to read the dip stick through the oil. Get the dirty oil analyzed.

Bored&Stroked 01-17-2019 06:19 PM

Re: Dark brown gravy for oil
 

I wouldn't put the block sealer in until you know you have an issue . . . no reason to fix a problem you may not have.

Jack E/NJ 01-17-2019 07:23 PM

Re: Dark brown gravy for oil
 

Yeah. GM used to add an old bar stopleak tablet or two to each one of their brandy new vehicle coolant systems as a preventative measure. And looked what happened to GM. 8^) Jack E/NJ

AnthonyG 01-18-2019 10:35 AM

Re: Dark brown gravy for oil
 

JS, I don’t use Stats in warm weather & usually run it minimally in winter. I realize they like to run a bit hot but always had a problem in warm weather keeping it from under 210 degrees w Stat’s. Engine has been prone to this since new. Read started many threads & assumed after nothing worked except no Stats that block had internal semi blockage issues. Many flushes and many products later I gave up & no stats worked in warm weather so stayed with. Your right in thinking it doesn’t reach temp in the winter so starting & running for 30 mins every couple weeks could have caused the condensation issue.
Thx

AnthonyG 01-18-2019 10:39 AM

Re: Dark brown gravy for oil
 

Probably should put stats if running at all in cold weather.

FRANK PKNY 01-18-2019 10:51 AM

Re: Dark brown gravy for oil
 

Water is the cause, either it's not getting hot enough, or you have a leak, gasket, crack. Et. Try a pressure test. Should help you evaluate the condition of your cooling system. Easy to do, won't hurt anything.

flatjack9 01-18-2019 01:42 PM

Re: Dark brown gravy for oil
 

Quote:

Originally Posted by AnthonyG (Post 1717411)
JS, I donít use Stats in warm weather & usually run it minimally in winter. I realize they like to run a bit hot but always had a problem in warm weather keeping it from under 210 degrees w Statís. Engine has been prone to this since new. Read started many threads & assumed after nothing worked except no Stats that block had internal semi blockage issues. Many flushes and many products later I gave up & no stats worked in warm weather so stayed with. Your right in thinking it doesnít reach temp in the winter so starting & running for 30 mins every couple weeks could have caused the condensation issue.
Thx

There is your problem. Running the engine like that is one of the worst things you can do to an engine. The oil never gets warm enough to cook the moisture out. Most of the wear to any engine is during initial startup and running. Thermostats are needed to warm the engine faster to negate the wear. Quit doing that and you will be just fine. Your engine will thank you.

AnthonyG 01-18-2019 03:37 PM

Re: Dark brown gravy for oil
 

What's the pn# of the Subaru thermostats I see people using.


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