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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 12:26pm

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 12:46pm

Doc P

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

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

17th Nov 2018 12:53pm

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 12:59pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

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 1:24pm

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 1:32pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

17th Nov 2018 2:08pm

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 5:52pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 7683

2011 Defender 110 Puma 2.4 USW Stornoway Grey

Change mine every 6k or so, 2.4. Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop

17th Nov 2018 5:58pm

williamthedog

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

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

17th Nov 2018 6:02pm

NickMc

Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1568

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 11:40pm

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 10:35am

Badger110

Member Since: 06 Feb 2018
Location: South hams
Posts: 1025

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 10:40am

Martin 01

Member Since: 13 Feb 2012
Location: East Yorkshire
Posts: 499

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 12:23pm

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 4:49pm

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