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Bluest



Member Since: 23 Apr 2016
Location: Lancashire
Posts: 4316
United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Java Black
I understand what you're saying about monitoring trends, and Will do another sample next oil change, but would you not agree that the soot content being so high after such low mileage warrants a closer look now? That's reinforced to me by Will's reading from his engine that is a much older and therefore I'd expect to be "dirtier" than a Puma. 2007 110 TDCi Station Wagon XS
Post #1073110 10th Aug 2025 7:41pm
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andy63



Member Since: 30 Jun 2023
Location: north east
Posts: 814
United Kingdom 
Im not sure what I'd be doing tbh..
Are the injectors pockets on the 300tdi external to the rocker cover.. if so then that's not a source of contamination of the oil on his engine, but could be on yours..the issue is do you go ahead with trying to determine where your issue lies.. having to re fit injectors with new sealing washers wouldn't be that bad if you wanted to rule that source out..
Im saying that but its not a job I've done on the defender up to now..
Post #1073128 11th Aug 2025 6:31am
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leolito



Member Since: 07 Jul 2025
Location: Sofia
Posts: 15
Bulgaria 
Maybe silly questions but I am not knowledgeable about this ... can the high soot content be a source for the 'blackness' of the Diesel oils? And in what manner it could/would affect the performance of the oil as a lubricant?
I am always wary of the newflanged "long interval oils" and I am now thinking if these are potential results after a fairly low mileage, and if this was not an isolated case, how interesting would be to see the results with double - or triple - the mileage Shocked
Post #1073129 11th Aug 2025 7:08am
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