Member Since: 21 May 2024
Location: Scunthorpe
Posts: 4
Oil change 5w30 or 5w40 for 2.7 TDV6
Recently bought a 2009 Discovery 3 2.7 TDV6, I am planning on doing the next service myself. I have heard from a few people that it is better to run it on 5w40 rather than the recommended 5w30?
Thanks in advance
15th Jun 2024 4:32 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20839
5w30 is the only oil specified by JLR for the UK market.
You can trust the vehicle manufacturer who spent millions of pounds in testing with Castrol, or strangers on the Internet... My D3 Build Thread
Member Since: 17 May 2021
Location: Ireland
Posts: 15
Though I agree with Disco Mikey, 5W 30 is what the manufacturer specified but we have to remember that manufacturers see the life of a car at about 10 years. They really don't care about old cars, I run an 06 Disco 3 and a 12 RR Westminster. On the Westie I follow the specs as shes new-ish but my Disco is cruising to be 20 in a couple of years. I ran 5W 30 for the first couple of oil changes but then after I did the oil pump and all belts I decided to try the 5w 40.
The fist thing I noticed was it was quieter. There where no oil pressure issues or oil pump circulation delays. I'm going to be doing my second oil change and I will go with the 5w 40 again.
All that said, My disco 3 is a non DPF model with Blanked EGRs by previous owner so I can probably run dishwasher soap and its be fine, but if yours has a DPF you need to consider that. There are lads on here and fullfatrr that are much more proficient on the science than I am. Below is what Liqui Moly say you need if you have a DPF
Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4519
JLR didn't do the durability testing on the Lion engine project, Lotus did. In Norfolk.
5W30 was chosen as the best compromise between durability and emissions, with emissions being a driving factor.
My choice is to run on 5W40.Richard
D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.
Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone
16th Jun 2024 12:41 pm
Fla
Member Since: 17 May 2021
Location: Ireland
Posts: 15
Era ya, everyone is going to probably favour 5w 30. For me emissions are not a concern once it passes our Irish CVRT.
My disco is up on 280,000km so its probably got more mileage on it than a lot of the UK cars so maybe that's why the heavier oil seems to suit it. People have done oil analysis tests after using the 5w 40 and they got a clean bill of health so I think there is probably no right or wrong answer in the sense of a 20 year old engine with high mileage is end of life anyways and I think people just need to make a personal choice.
The arguments put forward by LR Time were quite good and most of the arguments against are pretty much its what the manual specs but none of us here have gotten 2 engines, run them on both oils and then ripped them to see wear so we are all winging it really.
@ OP
Do your research and make a choice but DPF is going to probably decide for you as a high ash oil could clog it. My D3 runs with no smoke of any kind and always passes the emissions test.
16th Jun 2024 1:52 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 5040
After 100k miles my preference is for 5w40 and have used it in all my customers D3's for years now without issue.
PSA also recommend 5w30 or 5w40 for cold or temperate climates, but not 5w30 if there is a DPF fitted!! 10w40 and 15w40 are their recommendations for hot climates.yµ (idµ - eAµ) ψ=mψ
16th Jun 2024 2:59 pm
andyfk
Member Since: 21 May 2024
Location: Scunthorpe
Posts: 4
Thank you all. Mines a 09 plate with 91k on, service history suggests it’s been fairly well maintained I’ll check about the dpf but if it’s no dpf I think I will definitely consider 5w40. I’ve heard the 5w40 is better for engine noise as well and also heard it’s better for the dreaded camshaft problem, not sure if this is legit?
Thanks 👍🏼😄
16th Jun 2024 8:12 pm
Fla
Member Since: 17 May 2021
Location: Ireland
Posts: 15
I dont worry about the camshaft in the D3 as its not as big an issue as compared to the 3.0, thats why I ended up with a 4.4TDV8 as Im not sure I could handle the worry of the 3.0. Technically it only happens a small few but for those it happens to its either right off your car or spend 5-10k fixing it which is awful.
17th Jun 2024 6:50 am
swerve
Member Since: 01 Jan 2011
Location: AF
Posts: 8
3rd year running 5w40 c3 - including Mannol Ceramo 300ml.
Mixed urban 28.3mpg
Motorway 31.0mpg
Manual 2.7
A high miles 05' engine.05' TDV6 2.7 manual
30th Jul 2024 5:40 pm
twr7cx
Member Since: 03 Mar 2019
Location: Tasmania
Posts: 184
Personally I would be more worried about the other specifications of the oil before worrying about 5W-30 or 5W-40.
We have 2 x MY12 D4 2.7 TDV6 and 1 x MY09 D3 2.7 TDV6 - both have used 5W-30 and 5W-40 in them. I now only use Penrite HPR 5 5W-40 because it meets the right specs (is recommended by Penrite for this application) and is the same oil used in our BMW which means I can buy in bulk.Mine - MY09 L319 D3 HSE Lion 2.7 TDV6 and modified MY03 LT L318 Discovery 2a HSE Td5 15P
Hers - MY12 L319 D4 Lion 2.7L TDV6
Dads - MY12 L319 D4 Lion 2.7L TDV6
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