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Doc P

Member Since: 03 Apr 2016
Location: Midlands
Posts: 565

2013 Defender 110 Puma 2.2 XS CSW Firenze Red

Oil change frequency?

Seems like clockwork that every 6 months I get an 'Oil Service' message appear in my dash message window. It's on again and I changed the oil at the end of March/beginning of April at the last service. Regular phenomenon for the last 2 1/2 years.

Presumably, the ECU has predicted (or calculated) excess diesel in the engine oil (> 7%?) again.

We do about 8500 miles/year which is mostly short hops/bit of off road (shooting). Engine is the 2.2 TDCI with 38k miles on it. I suppose the way it is used contributes to this.

Is this acceptable or is something afoot?

I suppose changing the oil every 6 months isn't a bad thing for the sake of £50.

17th Nov 2018 11:26am

Adam17

Member Since: 15 May 2018
Location: Within Bedfordshire
Posts: 1193

I watched a youtube video, and it was the opposite almost... It was based in the States

Garages had been suggesting 6 monthly and in some cases 3 monthly, but actually it said to check the handbook - which in most cases stated to change yearly or 'X' amount of miles.

I have a TD5 - what does your manual state? Regards
Adam

Loving The Duchess
The Defender 110 TD5 XS

My Defender story - http://www.defender2.net/forum/topic64005.html

17th Nov 2018 11:46am

Doc P

Member Since: 03 Apr 2016
Location: Midlands
Posts: 565

12,500 miles or every 12 months - whichever's sooner.

17th Nov 2018 11:53am

Adam17

Member Since: 15 May 2018
Location: Within Bedfordshire
Posts: 1193

That's odd then, that your truck is pinging up every 6 months...?? Regards
Adam

Loving The Duchess
The Defender 110 TD5 XS

My Defender story - http://www.defender2.net/forum/topic64005.html

17th Nov 2018 11:59am

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4785

It's the ECU calculating diesel content in the oil (based on the number of active DPF regens) the only problem is the ECU will still count a partial/failed regen as a full one.

If it was part way through a regen and you turned it off then it won't have completed its cycle but will still count it as a full one.

Obviously doing lots of shorter trips will increase the likelihood of turning off during a cleaning cycle.

I definitely wouldn't ignore the light though. As you say, for the sake of £50 may as well get it done

2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
Td5 90 Thread http://www.defender2.net/forum/topic50767.html
Tdi 110 Thread https://www.defender2.net/forum/topic69562.html
RRC Thread http://www.defender2.net/forum/topic54492.html
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17th Nov 2018 12:24pm

Doc P

Member Since: 03 Apr 2016
Location: Midlands
Posts: 565

Thanks guys. Nice to know it's not necessarily anything 'bad'.

I'm getting it done

17th Nov 2018 12:32pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4785

17th Nov 2018 1:08pm

Cupboard

Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

2011 Defender 110 Puma 2.4 HT Corris Grey

I was curious what the viscosity of diesel was compared to engine oil, in case I'm not the only one here goes:

10W engine oil at -18C is 1300 centiStokes
30 engine oil at +100C is ~11 centiStokes
(I think that's correct for a 10W30 oil?)

Then for diesel at 55C it's about 2 centiStokes

source: https://www.engineeringtoolbox.com/kinematic-viscosity-d_397.html

So it's quite a bit runnier even than SAE20 oil.

I wonder how the lubricity differs.

17th Nov 2018 4:52pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8021

2011 Defender 110 Puma 2.4 USW Stornoway Grey

Change mine every 6k or so, 2.4. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

17th Nov 2018 4:58pm

williamthedog

Member Since: 29 Dec 2012
Location: south wales
Posts: 3441

Once a year, mileage 3-4k.
2.4 engine.

17th Nov 2018 5:02pm

NickMc

Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1624

Oil is cheap- engines aren’t 6k change for me, just not worth it for the price of oil and a filter.

17th Nov 2018 10:40pm

Adam17

Member Since: 15 May 2018
Location: Within Bedfordshire
Posts: 1193

I guess that's a good way of looking at it. I am always up for preventative maintenance ... Regards
Adam

Loving The Duchess
The Defender 110 TD5 XS

My Defender story - http://www.defender2.net/forum/topic64005.html

18th Nov 2018 9:35am

Badger110

Member Since: 06 Feb 2018
Location: South hams
Posts: 1039

2011 Defender 110 Puma 2.4 USW Buckingham Blue

Does the service light go out once the new oil has circulated the engine?

18th Nov 2018 9:40am

Martin 01

Member Since: 13 Feb 2012
Location: East Yorkshire
Posts: 502

Around every 6000 miles for my Td5 as a few have stated already.
Oils & filters are cheap enough.
Not a great believer in these 20,000 mile services for modern cars.

18th Nov 2018 11:23am

Doc P

Member Since: 03 Apr 2016
Location: Midlands
Posts: 565

Badger110 wrote:
Does the service light go out once the new oil has circulated the engine?

It’s reset manually.

18th Nov 2018 3:49pm

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