Black Gold-Texas Tea? - Chevelle Tech
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post #1 of 13 (permalink) Old Feb 16th, 17, 1:54 AM Thread Starter
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David
 
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Black Gold-Texas Tea?

Man, things jus keep getting more interesting. Among many other fixes & adjustments I've been busy with on my recently acquired '69 454, I immediately decided to change the oil/ filter as the PO let it get REAL black. So I used my standard go-to oil, Mobil 1 synth. Now two weeks and 25, yes 25 miles later, it's black again! Wtf? Any suggestions?

Dave
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post #2 of 13 (permalink) Old Feb 16th, 17, 3:27 AM
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Re: Black Gold-Texas Tea?

Change the filter, see if that cleans things up a bit. It might be a good idea to pull a valve cover to check if there is sludge build up.

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post #3 of 13 (permalink) Old Feb 16th, 17, 6:21 AM
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Re: Black Gold-Texas Tea?

This happened to me once as well. No sludge build up or anything, but the PO clearly let the oil changes go way too long and the oil was really black.

I had to change the oil 3 times, with about 50-75 miles in between each, before it stopped turning black in that timeframe. It now stays a nice color for the normal timeframe of an oil change.

My assumption was that it took a few changes to fully flush out all the old black junk oil from all the little nooks and crannies, and that even a little bit will turn all the new oil a nasty color rather quickly.
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post #4 of 13 (permalink) Old Feb 16th, 17, 7:53 AM
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rick
 
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Re: Black Gold-Texas Tea?

Id use some cheap oil & filters a couple changes @ 25-50 mi each untill it clears up then use some good oil and a good filter
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post #5 of 13 (permalink) Old Feb 16th, 17, 7:54 AM
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Re: Black Gold-Texas Tea?

If there is such a thing as cheap oil anymore
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post #6 of 13 (permalink) Old Feb 16th, 17, 10:36 AM Thread Starter
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Re: Black Gold-Texas Tea?

No sludge in valve cover area thankfully. I will do the oil change purge thing. Anyone ever use anything like "seafoam" additive or ?

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post #7 of 13 (permalink) Old Feb 16th, 17, 11:22 AM
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Re: Black Gold-Texas Tea?

Once the oil change interval is extended beyond generally accepted good practice (3000 mi.?) there is still a lot of sludge and dirty oil remaining in the engine and pan after the nasty oil is drained. It may take several oil and filter changes to get all of the dirty oil out of the engine. Just before changing the oil and filter (100, 200 miles or so), add a pint or so of Diesel fuel to the crankcase. The Diesel fuel will help clean the engine with no damage to the engine, just don't leave it in too long.
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post #8 of 13 (permalink) Old Feb 17th, 17, 4:02 AM
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Re: Black Gold-Texas Tea?

Some modern oils will turn black if you heat them in a pan on a stove. But try the repeated oil changes.

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post #9 of 13 (permalink) Old Feb 17th, 17, 1:13 PM
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Re: Black Gold-Texas Tea?

Quote:
Originally Posted by engineguy View Post
Once the oil change interval is extended beyond generally accepted good practice (3000 mi.?) there is still a lot of sludge and dirty oil remaining in the engine and pan after the nasty oil is drained. It may take several oil and filter changes to get all of the dirty oil out of the engine. Just before changing the oil and filter (100, 200 miles or so), add a pint or so of Diesel fuel to the crankcase. The Diesel fuel will help clean the engine with no damage to the engine, just don't leave it in too long.
Good advice! Hadn't heard the diesel fuel additive before, will have to try it. Reminds when we us to run 1/2 qt Dexron fro a couple of hours to clean her out.

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post #10 of 13 (permalink) Old Feb 17th, 17, 11:53 PM
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Re: Black Gold-Texas Tea?

Personally, I would put a quart of ATF in, in place of one quart of oil, good luck!
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post #11 of 13 (permalink) Old Feb 18th, 17, 10:18 AM
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Re: Black Gold-Texas Tea?

No offense,I know trans fluid is a great cleaner,but youre thinning out your oil by doing so.Maybe good,maybe bad,IDK for sure.
I would feel more comfortable on one of my motors I was trying to save by getting a moderately priced HD oil,and changing that two or three times.
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post #12 of 13 (permalink) Old Feb 18th, 17, 12:49 PM
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Re: Black Gold-Texas Tea?

Transmission fluid OR Diesel fuel will thin the oil slightly. This why it is recommended that you use it for a short time, i.e. 100 to 200 miles maximum, at normal speeds. Have not personally used transmission fluid for this, but have used Diesel fuel and it does work.
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post #13 of 13 (permalink) Old Feb 22nd, 17, 9:44 AM
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Re: Black Gold-Texas Tea?

Quote:
Originally Posted by LeoP View Post
Personally, I would put a quart of ATF in, in place of one quart of oil, good luck!
I've done this and it worked beautifully. Ran it back and forth to my shop for a couple of days and it really cleaned the gunk out of the engine.
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