Range Rover Oil Dilution issues

[l_chilli97]

Hi there

I am just looking for others that may have had a issue with oil dilution on their Range Rovers?

I have received correspondence from 2 owners who have had issues with needing regular oil services and then being forced to pay for these changes themselves.

Has anyone had any similar issues that I can speak to about this?

Thanks

[l_chilli97]

Hi there, thanks for your message!

Where did you find information on that recall? Can't seem to find anything in a quick google search and would love to find out more about that? Definitely could be something to look at in relation.

Thanks

[l_chilli97]

jon-yprpe said:

Pretty well known - 2015/16 cars (first of the 306bhp) at around 10-20k miles.

Mine (65 plate) failed at just over 10k Miles. New engine required, thankfully under warranty. However fitted by dealer who forgot to do up the radiator hoses which then required another recovery after it dumped coolant everywhere and overheated the new engine.

Got rid of it after that as completely lost faith in it. Shame as I loved it until then.

Hi Jon, anywhere I can contact you at all to discuss your issues with the car further?

[l_chilli97]

DisillusionedSport said:

Oil dilution (and possible DPF clogging) is caused by post injection during DPF regenerations and it affects all EU6 diesels to some extent.

Across JLR's range of diesels the effects of the problem vary from "not at all affected" to "severe" dependent on the chassis and engine combination. In 2016 (about 6 months after the introduction of EU6 for all new vehicles) the problem was being widely reported on the Discovery and RR Evoque Ingenium diesels based on the D8 chassis. An important internal service compliance notification, JLRP00100, described "architecture and hardware" problems which the company said were responsible for diesel dilution on the D8 vehicles and the three D7u models: FFRR, RRS and D5. Download the SCN here:

https://www.discosportforums.co.uk/download/file.p...

The problem remains almost unheard of on cars with a close-coupled DPF (e.g. Jaguar XE). At some point in 2018 JLR wrote to Sales staff with a comprehensive description of the problem and a model-by-model breakdown of which cars are worst affected.

JLR Letter: https://www.discosportforums.co.uk/viewtopic.php?f...

A graphical explanation of the problem on D8 cars can be found on the E-Pace forum:

https://www.epaceforums.co.uk/viewtopic.php?f=8&am...

A long-running discussion (mainly on the DS forum) concluded that JLR's Ingenium engine wouldn't fit into the D8's (transverse) engine compartment with the close-coupled DPF that was successfully deployed on the (in line) Jaguar XE. Because the engineers weren't able to use the XE's DOC-DPF-DEF-SCR architecture they had to create a totally different system using a remote DPF combined with the SCR (SCRF) and a loosely-coupled, intermediate, DOC. This system performed so badly in the real world that it reduced service intervals by an average of 12,700 miles - to 8,300 miles - according to user data collected on the DS forum. This closely matched the findings of JLR aging tests conducted at Gaydon which showed that diesel dilution rose at approximately 0.67% per 1,000 miles meaning that, to avoid engine failure, the oil in the test vehicle needed to be changed on average every 9,170 miles.

These mileages were obtained using a limit for diesel dilution of 6%. According to JLRP00100, continued vehicle usage with high oil dilution carries an increased risk of engine failure. Despite putting its name to this cautionary statement in 2017 the company subsequently issued a software "upgrade" (N289) which increased the in-service diesel dilution to 10%. This should raise the average expected mileage between services to 13,300 miles and significantly reduce the demand for intermediate oil changes. Several customers who claim to have performed physical examinations state that the New L551 RR Evoque and "facelift" Discovery Sport L550 D150 and D180 MH SUVs retain the faulty exhaust architecture of their predecessors.

Edited by DisillusionedSport on Friday 27th September 00:06

Edited by DisillusionedSport on Friday 27th September 00:07

Appreciate all of this help! Thank you very much for explaining it all.