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Karim-V8



Member Since: 31 Jul 2022
Location: Frankfurt
Posts: 2

Germany 
3.6 TDV8 weird smelling engine oil - Diesel contamination?

Greetings all, been reading a lot here for years now and finally have something I need some help with.

Car is a 2008 3.6 TDV8 with about 240k kms (150k mi). Issue is, the engine oil smells funny. Been that way for at least 20k kms now.

Some 5 months ago I noticed the oil level went up a tiny bit after couple thousand kms even though LH side cam cover was leaking slightly (so should go down not up). Since then I had to put a liter in and it's somewhat staying the same now.
I'm now in the process of replacing both cam covers and I'm surprised how clean the engine looks inside.



I'm thinking there's a bit of Diesel in the oil which would explain the cleanliness and slightly rising oil level and possibly the smell.
Question is, where is it coming from? Could it be a leaking injector? It does have a slight fluctuation in idle speed intermittently, can barely tell by looking at the rev counter but can hear it when listening closely.

Or could it possibly be the shaft seal of the high pressure fuel pump that's leaking a wee bit?

Hoping someone has had simular issues, open to ideas Smile

Thanks guys
Karim

Post #717981 15th May 2025 3:57pm
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Haylands



Member Since: 04 Mar 2014
Location: East Yorkshire
Posts: 8655

England 2014 Range Rover Autobiography SDV8 Loire Blue

The main reason for diesel in the oil occurs when a regen of the DPF is cancelled, lots of short journeys and it will be a noticeable rise in level.

Stick your nose in the diesel tank filler, then the oil filler if it's similar there you go...

Personally I would change the oil and filter then change it every 10,000km... Thumbs Up Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Post #717995 15th May 2025 8:11pm
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Karim-V8



Member Since: 31 Jul 2022
Location: Frankfurt
Posts: 2

Germany 

Thanks Pete,
forgot to mention the car doesn't have DPF so that's not the issue. Maybe another idea?
It doesn't smell like diesel really, just a weird 'chemical' smell hard to describe.
Will change the oil and monitor oil level once everything is sealed up again and no more leakage.

Thanks
Karim

Post #718066 16th May 2025 5:46pm
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Haylands



Member Since: 04 Mar 2014
Location: East Yorkshire
Posts: 8655

England 2014 Range Rover Autobiography SDV8 Loire Blue

Thumbs Up Bow down Thumbs Up Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Post #718073 16th May 2025 8:31pm
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