Member Since: 20 Jul 2015
Location: Here
Posts: 575
Disco_Mikey wrote:
I am genuinely interested what research they (Christian + Vera) have done to decide that 5W40 is better than 5W30 (or even the 15W40 the manual also says can be used)
Given the million of £££'s of spending JLR/PSA have done, on top of the thousands upon thousands of miles of testing, 1 man on the interweb has an opinion, and spouts it as fact
It's just 'entertainment', they said so.
A good mate of mine made the 2750kg (to the 100g) trailers for the test mules LR used in UK, they were dragged in, worn out every few months having clocked up 150k, this went on for 18 months or so, with the same registrations on the mules & trailers (admittedly they may well have done an engine swap at some point to measure any wear). He bought one on release, only sold it last year due to ill health (his, not the D3).
6th Feb 2023 8:49 pm
Shamrock
Member Since: 16 Jun 2022
Location: South Kerry
Posts: 114
Disco_Mikey wrote:
I am genuinely interested what research they (Christian + Vera) have done to decide that 5W40 is better than 5W30 (or even the 15W40 the manual also says can be used)
Given the million of £££'s of spending JLR/PSA have done, on top of the thousands upon thousands of miles of testing, 1 man on the interweb has an opinion, and spouts it as fact
Opinions are of little value when they contradict evidence
Where evidence is lacking, not all opinions carry the same weight. The opinion of a loud entertainer is worth many times less than the quiet offerings of the subject matter expert
Come to the table with an opinion offered as fact, then the onus is completely on you to prove it with hard evidence, not warm populist feely stuff and appeals to anecdote.I know it's not considered "kind" to say no these days, but no. Just no, ok? And if it's not ok, still no.
7th Feb 2023 9:17 am
LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23823
That’s the problem, the people have had enough of experts and prefer the warm populist feely stuff. 2006 D3 HSE (Original & still the best)-GONE
2010 D4 HSE (A bit bling)-GONE
2014 D4 HSE (Almost too bling)-GONE
2015 D4 HSE (A heated what?)-GONE
2016 D4 Landmark (Written Off)-GONE
2016 D4 Landmark (Surely the last!) PD1881 rims-GONE
2017 FFRR SDV8 Autobiography (now semi-retired)
7th Feb 2023 9:32 am
Shamrock
Member Since: 16 Jun 2022
Location: South Kerry
Posts: 114
The problem is that the experts' advice is based not only on pragmatic criteria, but also on hidden objectives such as economic choices or environmental regulations. This is why everyone is reluctant to trust them, even if they are generally right.
7th Feb 2023 9:41 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14129
Was just curious and looked up the 2016 ACEA guide , yep, still don’t understand most of it,
see it says
“ consult manufacturer's owner manual/handbook in case of doubt.”
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
Shamrock wrote:
The problem is that the experts' advice is based not only on pragmatic criteria, but also on hidden objectives such as economic choices or environmental regulations. This is why everyone is reluctant to trust them, even if they are generally right.
oil thickness and spec have nothing to do with brand normally (there may be exeptions, as ever)
in our shop, we sell Mahle oil filters, i think there is generally speaking no doubt about their quality is it?
well: on a acertain BMW forum, someone, i think he is a mailman by trade, is considered as a "specialist"by many, and he is promoting Hiflo filter as "THE best"oil filter, by far........ i have never seen a reason why, but a lot, and i mean a lot, parrots are copying that opinion , so we sell also a lot hiflo oilfilters now.....
(Hiflo is not bad either, but NOT better than Mahle imho) IF we do maintenance for customers, we only use only Mahle though... (they are both the same price approx/minimal difference)
does not matter to me, but every time we do sell a Hiflo, we have a laugh here in the shop about a "mailman" (so we have a laugh every day )
The questions raises though.... speaking of "hidden objectives such as economic choices" is that mailman a troll maybe? in case of "brand specific"a more legitimate question than the subject of thickness and spec imho..
but believe what you want... as long as you are happy/feel goodBest regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
7th Feb 2023 10:30 am
Shamrock
Member Since: 16 Jun 2022
Location: South Kerry
Posts: 114
I think you didn't understand what I meant when I said "hidden objectives such as economic choices".
It's not a question of choice between brands, of course. I say that the oil choice for homologation of the car was also including a lowest fuel consumption and completion with Euro classification constraints through less friction instead of a better strength of the oil film at high temperature.
Everybody can see what constructors sometimes do to comply with regulations, like VW...
But no worries, understand what you want... as long as you are happy/feel good
It's not worth fighting over.
7th Feb 2023 11:43 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14129
Please excuse me but may I ask a daft question plse
If I heard it correctly within the first video about oil can drain from the oil filter and oil pump , however I thought there were check valves in both to prevent oil from draining , therefore keeping them primed , maybe I’ve totally misunderstood
As always , thanks a million and am so grateful for learning new things from so many extremely knowledgeable members
7th Feb 2023 11:45 am
jenseneverest
Member Since: 12 Jun 2017
Location: somewhere
Posts: 769
Shamrock wrote:
Nice one, that's pretty conclusive. All be it that they were using the slightly wrong 5w30 oil to begin with.
Would be good to compare oil pressure of the 5w30 B3 VS the 5w40 A3
but i would expect to see better oil pressure anyways.
7th Feb 2023 12:18 pm
Shamrock
Member Since: 16 Jun 2022
Location: South Kerry
Posts: 114
The title "6 years" seems to be pretty exaggerated, because the 5W30 certainly fits for a brand new engine. It's only when the engine takes age that 5W40 bring (perhaps) something... In my humble opinion.
7th Feb 2023 3:49 pm
HairyFool
Member Since: 04 Jan 2023
Location: North Essex
Posts: 676
That is a perfectly reasonable hypothesis In engineering terms, it would compensate for wear in bearings and other components. The problem is it really shouldn’t be done without the ability to monitor its effect, primarily oil pressure.
The fact is the manufacturers have done the testing including long term and do not appear to consider it necessary but I suspect because they don’t want the confusion of two different specs.A visitor from the dark side, my other vehicle is an is still an EV. Strictly speaking its SWMBO.
7th Feb 2023 4:32 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10676
gstuart wrote:
Please excuse me but may I ask a daft question plse
If I heard it correctly within the first video about oil can drain from the oil filter and oil pump , however I thought there were check valves in both to prevent oil from draining , therefore keeping them primed , maybe I’ve totally misunderstood
As always , thanks a million and am so grateful for learning new things from so many extremely knowledgeable members
There is a check valve thing, but when left for hours or days some oil will drain down
7th Feb 2023 7:34 pm
HairyFool
Member Since: 04 Jan 2023
Location: North Essex
Posts: 676
gstuart wrote:
Please excuse me but may I ask a daft question plse
If I heard it correctly within the first video about oil can drain from the oil filter and oil pump , however I thought there were check valves in both to prevent oil from draining , therefore keeping them primed , maybe I’ve totally misunderstood
As always , thanks a million and am so grateful for learning new things from so many extremely knowledgeable members
If oil remained in the filter due to its location when you remove the filter bowl oil would flood the top of the engine in normal circumstances.
When doing an oil/filter change you should unscrew the bowl 4 turns and leave it for a time. This pulls the filter off its spigot which allows the oil to drain out of the bowl and down through the engine.A visitor from the dark side, my other vehicle is an is still an EV. Strictly speaking its SWMBO.
7th Feb 2023 8:46 pm
RRSTDV8
Member Since: 07 Apr 2014
Location: Here
Posts: 13541
Shamrock wrote:
The problem is that the experts' advice is based not only on pragmatic criteria, but also on hidden objectives such as economic choices or environmental regulations. This is why everyone is reluctant to trust them, even if they are generally right.
People don't trust experts thanks to the internet strengthening the Dunning-Kruger effect. 5 minutes online and they think they know everything. Visiting from rrsport.co.uk
2012 RRS SDV6
2008 RRS TDV8
"When you fire that first shot, no matter how right you feel, you have no idea who's going to die! You don't know who's children are going to scream and burn. How many hearts will be broken. How many lives shattered. How much blood will spill, until everybody does what they were always going to have to do from the very beginning: SIT DOWN AND TALK!"
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