black oil
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Senior User
Joined: Oct 2005
Posts: 342
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black oil
So, I over filled my crank case by accident after an oil change, so I drained out the oil to a clean pan and was going to refill it to the proper amount. The oil had only been in there long enough for me to drive around for a bout 10 min. When it drained out, it was black black. It looked normal other than that: no gas, water or visible impurties. I change the oil regularly, and it looks like this when it comes out...but I expect that after 3000 miles, not 10 miles. Is this normal? Should I put this back in? Is the black a burning of the oil as a result of blow by?
I was thinking of tossing the oil and putting new in again, but I don't want to do that if it is getting black because of getting burned, and will just happen in the next 10 miles again.
Thoughts?
I was thinking of tossing the oil and putting new in again, but I don't want to do that if it is getting black because of getting burned, and will just happen in the next 10 miles again.
Thoughts?
Postmaster
Joined: Aug 2004
Posts: 2,908
Likes: 2
From: West Mansfield, Ohio
You know I've never done that before or known of anyone who has. I know the oil in mine stays a pretty decent color for at least 500 miles or so.
I'd say put the oil back in and run a can of seafoam throught he crankcase. But only do this for a small amount of time (maybe 20 or 30 miles) because theres numerous people on here who say it will thin out your oil too much. Although I don't see how a pint of seafoam can totally thin out 5 quarts of oil. But anyways, change the oil again and then put new in and see where that gets you. Thats just my advice, anyone want to back me up here?
I'd say put the oil back in and run a can of seafoam throught he crankcase. But only do this for a small amount of time (maybe 20 or 30 miles) because theres numerous people on here who say it will thin out your oil too much. Although I don't see how a pint of seafoam can totally thin out 5 quarts of oil. But anyways, change the oil again and then put new in and see where that gets you. Thats just my advice, anyone want to back me up here?
Freshman User
Joined: Oct 2005
Posts: 44
Likes: 0
I would put the oil back and then add an engine flush of some sort to the crankcase. Run the engine as especified by the flush instructions, and then change the oil again.
You may have put an oil with a high detergent concentration and that loosened much of the gums, varnishes or carbon deposits inside the engine.
You may have put an oil with a high detergent concentration and that loosened much of the gums, varnishes or carbon deposits inside the engine.
