 | Home > Td5 > What causes oil to get dirty? |
 
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| BCdefender Member Since: 26 Oct 2015 Location: Nanaimo Posts: 211   
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Sort of a funny question I know But I changed my oil about 6 months ago and a month ago when I checked it the oil was pristine. Now it has become noticeably dirtier. Could this be from driving down dusty logging roads? Its the only thing I've changed in terms of driving habits.
Thanks! 1999 Defender 110 2003 P38 2007 RR SC "And that's why it needs to be celebrated, because when the Defender goes we'll have lost this pointer to where we came from, and we're really going to miss it." My build thread: http://www.defender2.net/forum/topic47750.html Last edited by BCdefender on 2nd Jun 2017 2:02pm. Edited 1 time in total |
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2nd Jun 2017 5:23am |
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| Mash Member Since: 09 Feb 2015 Location: Guernsey Posts: 1674  
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As the oil travels around the engine in picks up microscopic metal partials, carbon deposits, old oil that is impossible to remove all traces of on an oil change, as it is constantly heating up and cooling down all these factors change the colour and consistency. 90 wolf - Jasmin http://www.defender2.net/forum/topic39408.html
90 V8 - Maggie http://www.defender2.net/forum/topic42564.html 110 TD5 - Buggsy http://www.defender2.net/forum/topic59029.html 52HG25 lightweight https://www.defender2.net/forum/topic72342.html D3 Hse - Fiona Capri 2l S - Anna Think I might have a problem............ |
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2nd Jun 2017 5:45am |
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| LR90XS2011 Member Since: 05 Apr 2011 Location: bickenhill Posts: 3612  
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if you have a good air filter the dusty roads make no difference , the black in diesel engine oil is just the soot from the combustion process, oil generally stays cleaner in petrol engines as there is less soot. lots of short journeys or idling will increase soot but dont worry dirty oil on diesels is normal. one other thing that can affect is is the detergent level of the oil, modern oils have high detergent levels to keep the engine clean hence they get dirty quickly but this is AOK as the soot in the oil is no biggie DEFENDER 90 TDCI XS,
I hope everyone is well and your land rovers make you happy |
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2nd Jun 2017 6:27am |
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| cobra_mark Member Since: 17 Feb 2015 Location: West Yorks Posts: 213 
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Had a sump change after my rebuild as the sump thread had been stripped, oil is still very clean.
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3rd Jun 2017 9:50am |
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| Clive Member Since: 21 Mar 2014 Location: Littleborough Posts: 467 
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It does help to try to ensure as much as possible of the old oil is drained when doing an oil change, I always take mine out for a drive beforehand to get everything up to working temperature and to make sure any particulate matter in the oil is in suspension rather than collected at the bottom of the sump. I then put the front on ramps, partly to improve clearance, but also the drain plug is at the back so it naturally drains better, plus any oil in the galleries in the head and block will drain more thoroughly,
Any residual oil left in the engine after a change will very quickly discolour the new oil but it's not really too detrimental, diesels are a dirty engine anyway and as LR90XS2011 says it's mainly soot from the combustion blow past, a perfectly natural occurrence. This is mine after two days and about 50 miles  Click image to enlarge |
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3rd Jun 2017 12:52pm |
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