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Home > General > Oil colour after oil change |
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simont Member Since: 15 Feb 2011 Location: Sunderland/Newcastle Posts: 1809 |
How long should the oil, after an oil change, stay that nice new browny colour - before it turns to good old black? 2002 Honda VFR800
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1st Mar 2011 2:34 pm |
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lmorris4975 Member Since: 28 Feb 2010 Location: Mansfield, Notts Posts: 252 |
In a diesel you will be lucky if it stays brown for a day. It quite normal for the oil to turn black almost straight away |
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1st Mar 2011 2:44 pm |
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wizking Member Since: 18 Mar 2010 Location: Around Posts: 1848 |
Even after a flush it turns black very quick. |
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1st Mar 2011 3:01 pm |
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dunroof Member Since: 24 Nov 2010 Location: <> Yes, still being stalked by another member! Posts: 1785 |
Yep, agree. |
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1st Mar 2011 7:09 pm |
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Triple7 Member Since: 20 Apr 2010 Location: Wiltshire Posts: 232 |
Thats why intermediate oil changes are good for diesel engines... 2010MY Freelander 2 HSE Auto
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1st Mar 2011 8:01 pm |
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dunroof Member Since: 24 Nov 2010 Location: <> Yes, still being stalked by another member! Posts: 1785 |
Everyone to their own, personally I think it's a little pedantic. |
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1st Mar 2011 10:14 pm |
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EYorkshire Member Since: 18 Nov 2010 Location: (!) Posts: 4392 |
The color of the oil has no bearing on its lubricity or whether its any good or not. All diesel engine oil will turn black in the first few hours because of the contaminates generated by combustion and the soot particles. The oil filter will take out the larger sized soot particles that can cause engine wear and the additives in the oil are supposed to hold the smaller soot particles in suspension, its these particles that change the colour of the oil.
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1st Mar 2011 10:34 pm |
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Kostaschrys Member Since: 26 May 2010 Location: Athens Posts: 101 |
The oil will turn black quite soon, depending on the engine parameters. As a chemical engineer working for years in the lubricant industry I could tell that the main role of a lubricant is, Reduction of friction, Protection against wear, Protection against corrosion, Heat transfer, Cleanliness and soot suspension in internal combustion engines and of course Fuel economy. All of the above is done through good base oil and proper additive selection.
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2nd Mar 2011 8:26 am |
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commando Member Since: 27 Apr 2007 Location: lancashire Posts: 208 |
I had a new Disco in 2006 and the oil stayed clean for months.Could it be because they have 2 oil filters? Stornaway grey SE auto with 18" alloys |
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9th Mar 2011 4:39 pm |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 |
In a virgin engine, indeed the oil is clean for a period of time until the soot accumulates.
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9th Mar 2011 7:28 pm |
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