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  #1  
Old 03-09-2003, 02:50 PM
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Join Date: Jan 2003
Location: MINNEAPOLIS, MN
Posts: 140
Oil turns dark fast!

I just did an oil change in my 1985 300TD Wagon and I noticed that the oil turns dark within a few miles of driving. The technician assured me that in diesel engines the occurence is normal and he sees it all the time. He suggested the engine flush liquid which apparently cleans junk in the engine (done when the old oil is drained and before new oil is poured in). Please tell me that he is right. What would cause this to happen? I thought that oil changes color over time but in my 260E W124 that happens over 4000-5000 miles from the oil change and the oil still remains lighter color then.

P.S. It was -10 this morning with -30 wind chill and after two glow cycles and not being pluged in she started on me the first try!!!

Igor Zeljic, Minneapolis.
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1984 MB 300D Turbo Diesel W123 Sedan 132K
1987 MB 300D Turbo W124 Sedan 295K
1983 Porsche 944 104K
1989 Audi 80 Quattro 180K
2002 Audi A6 3.0 Quattro Avant 49K (Wife's car with warranty )

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  #2  
Old 03-09-2003, 03:10 PM
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Join Date: Dec 2001
Posts: 571
You may get an answer on this forum; however, there is a diesel forum here too. Maybe you should post there as well.
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  #3  
Old 03-09-2003, 03:23 PM
'82 300TD-T
 
Join Date: Oct 2001
Location: SoCal
Posts: 276
Igor Zeljic:

In addition to checking out the Diesel Forum, you really ought to familiarize yourself with the search function. Most of your recently asked question have been discussed at length.

For example, Black Oil?
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  #4  
Old 03-09-2003, 03:25 PM
LarryBible
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Posts: n/a
Yes, that is absolutely normal in a gas engine. In fact, if it is brown when you first change it, then the engine is relatively clean and the oil changes are being kept up with.

The black that you are seeing is soot. If you will use one of the Universal grade oils that is designed for over the road diesel trucks, there are additives to help deal with the soot. These are oils such as; Chevron Delo 400, Shell Rotella T and Mobil Delvac.

Good luck,
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  #5  
Old 03-09-2003, 03:41 PM
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Join Date: Jan 2003
Location: MINNEAPOLIS, MN
Posts: 140
Thanks

Thanks for the hint on the search, it really helps me understand the diesels a lot better.
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1984 MB 300D Turbo Diesel W123 Sedan 132K
1987 MB 300D Turbo W124 Sedan 295K
1983 Porsche 944 104K
1989 Audi 80 Quattro 180K
2002 Audi A6 3.0 Quattro Avant 49K (Wife's car with warranty )

http://banners.wunderground.com/bann...inneapolis.gif
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