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• Black oil o in Diesel engines 17 Nov 2001 (Forum)
  What is so different about the combustion process in the cylinfder of a diesel engine that turns oil black after very little use. Even in brand new diesels the oil seem to go black very rapidly. Does this affect lubrication, ? why doesnt the filter pick it up. Should oil be changed MORE frequwently in diesel that Petrol engines whose oil often remains clear often even in older engined and even after many thousands of milkes.
• Renault Clio Diesel - How soon should new oil turn black? 12 Dec 2011 (Forum)
  Our diesel Clio recently had its first service after 9 months and 12000 miles. Today, one week and 180 miles later, I was checking the fluid levels for the first time since the service and noticed that the oil was black.
• black oil 27 Dec 2002 (Forum)
  I had an oil change recently on my BMW diesel,I used Mobil 1 semi synthetic as per past thread recommendations the oil went black quite quickly.Is this usual?
• New oil from service is black already? 12 Feb 2007 (Forum)
  I have just had me Audi A4 2.0 diesel in for its first long life service at 18000 and when I checked the oil the next day it was black. I rang the dealership and they said it was normal and it was the carbon deposits. Surely these would have been removed when the old oil was changed.
• Ford Mondeo - Engine oil in diesel 10 Nov 2013 (Forum)
  2004 ford mondeo tdci. Hi I'm new here do forgive me if I do this wrong. Car lacking power, black smoke and excessive oil usage. Removed the fuel filter yesterday to find the diesel black so now I know where the oil is going but where to start to find the problem? High pressure pump?
• Ford Focus (1998 - 2004) - 2002 1.8 Oil change on diesel 10 Dec 2008 (Forum)
  I changed the oil on my 1.8 tdci 2 weeks ago and have covered about 300 miles. Normally I would get a garage to change it (anyone agree its a hassle to change the oil and filter on the diesel focus?). After the change the oil looked about 25% black.
• Suzuki Swift - mpg and black oil 8 Jan 2013 (Forum)
  My swift is 8 months old with under 7000 on clock and i have noticed a decrease in mpg. I am only getting 51 instead of 68. Its a 1.3 diesel 2012. I checked the oil and this is black which is not right for the age and mileage. Any ideas?
• TDCi oil black immediately after garage 13 Aug 2006 (Forum)
  Hi, I have to get my 03 Mondeo TDCi (31000 miles) garage-serviced for a insurance-type warranty. When I got the car home (4 miles) the oil was already black! I've heard this happens quickly with diesels, but that quickly??? I have had little previous experience with diesels. Could someone with greater knowledge help me to guess whether this is normal or should I do it again myself to be certain please?
• Peugeot 207 sport diesel 2008 - oil change 11 Aug 2010 (Forum)
  i had my car serviced 5 days ago and as part of that service the oil and filter was changed.After 2 days i checked my oil level and found the oil to be black this made me think that the oil had not been changed.I took the car back to the garage and asked them if this was normal they said it was normal as when the oil is drained not all of the old  oil drains out of the engine so when the new oil is added it mixes with the old old that was left in the engine thus causing the oil to look black they said this happens with diesel engines is what they told me correct or not.
• should oil still be black after service ? 19 Jul 2009 (Forum)
  Car had a service today (first service of the diesel engine if it helps) and checked the oil and the level is slightly up from where it was prior to the service but it is still black. Should this be the case ? It looks like the garage has just topped up the oil and charged me for new oil and filter.
• Peugeot 308 1600 Diesel. - OIL> 10 Sep 2010 (Forum)
  Hi everybody,I purchased a 2009 Model 3 wks ago from a dealership and was told the car would be serviced,on collection I found the engine oil to be Black,I raised this point with the mechanic who told me diesel engines all do that,He said on starting the oil turns black after 5mins running.I,ve drove Machines all over the world working in Quarries but this is first time I,ve heard that.Is this correct?.
• focus diesel 1.8 tddi mk1 y reg - oil sludge in hoses 12 Jan 2011 (Forum)
  i have oil sludge in the hoses leading from the emmisions control value through to the intercooler engine runs fine slight black smoke on acceleration...
• Volkswagen Passat - Diesel black smoke 8 Sep 2011 (Forum)
  Hi all,   I'm getting a bit concerned about my 2006 Passat TDI PD 105bhp. It has covered 130k miles however I've noticed that it has started...
• Honda Civic 2.2 Diesel - Oil change for Diesel Honda Civic 25 Mar 2013 (Forum)
  Hi New to this so hello to all and sorry if I ask some stupid questions. Anyway here goes; Bought a diesel civic 2.2 last September. Done about 4500 miles. The oil is black. Previous petrol Hondas still had cleanish oil when the recommended services were done. Realise that diesel is relatively dirty stuff but surprised how quickly it appears to have become contaminated.
• Should I change my oil? 28 Mar 2006 (Forum)
  I just topped up the oil in my new car (done less than 5000 miles). The first service isn't due until 12500 miles, but I notice the oil looks very black. It's a diesel (my first) - should I expect 'blacker' oil than with a petrol, or is it best to get an oil change done before the manufacturers recommendation?
• Toyota RAV4 2.2 D4D 2006 124k - Black smoke cloud 21 Aug 2020 (Forum)
  Hello, bit of black smoke on start, clouds under acceleration on overtaking on motorway. Slight ticking from engine. Air and fuel filters replaced , no difference. Pulls ok, engine quite smooth but diesel knocking a bit.
• Colour of oil after a service 10 Sep 2003 (Forum)
  as jet black as the old stuff. I realise that the oil in a diesel does blacken quickly but after 15 miles ?? Could there possibly be a residual sootyness left in the engine bad enough to contaminate the new oil like this or should I be suspicious and tackle the dealer about it.
• Renault - Master - 96 2.5 too much oil- no engine start 23 Sep 2009 (Forum)
  Dear All, recently I put too much oil in the engine of my Renault Master 1996, 2.5 diesel minibus (110,000 miles). At the MOT check when at high revs the van started chucking out black smoke, when the tester turned off the ignition, the engine still ran.
• kangoo diesel 20 Oct 2006 (Forum)
  i have a 1999 t 1.9 kangoo which has done 112k. when you put your foot down it hesitates for about 2 seconds then gos leaving a black cloud of smoke. ive...
• Volkswagen Golf V (2004 - 2008) - 05 1.9 Advice Engine oil colour on a diesel 2 Jul 2008 (Forum)
  My in-laws bought a Golf deisel six months ago from a main dealer who did the 36k service including the oil change. This is the first deisel they have...