![]() | Home > Maintenance & Mods (L405) > Low SAPS 5W40 synth engine oil |
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kevinp Member Since: 28 Sep 2019 Location: Telford Posts: 1357 ![]() ![]() ![]() |
Gremlin, I for one would deffo use the 40 grade oil if one could be made.
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bozmandb9 Member Since: 06 Dec 2010 Location: Wallingford, Oxfordshire Posts: 1055 ![]() ![]() |
Hi Gremlin, sorry I know it's an old thread, but is there a C4 5W40 which we can currently buy off the shelf, since I'm going off my noggin trying to find one? Otherwise, is it best to buy 'Low Saps C3? I'll post some photos of my calipers, as I finally got around to taking them! 2012 SDV8 Vogue SE |
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Gremlin500 Member Since: 11 Mar 2022 Location: Newcastle, UK Posts: 1851 ![]() ![]() ![]() |
The short answer is no, at least not in small quantities, only in bulk (like 5 figure sum bulk). I was prepared to go for it, but got a lukewarm reception on here, so didn’t.
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Mohawk Member Since: 07 Oct 2025 Location: Bristol Posts: 9 ![]() ![]() |
So as an SDV6 3.0D engine owner I've seen the LR time videos & been looking at oil grades etc & found this thread.
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Shaun_ Member Since: 02 Feb 2017 Location: New Forest Posts: 91 ![]() ![]() ![]() |
So you joined the forum today, don't own a Range Rover and that's your opening post is it?! Wow! 2012 TDV8 Westminster in the New Forest
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Shaun_ Member Since: 02 Feb 2017 Location: New Forest Posts: 91 ![]() ![]() ![]() |
So you joined the forum today, don't own a Range Rover and that's your opening post is it?! Wow! 2012 TDV8 Westminster in the New Forest
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Mohawk Member Since: 07 Oct 2025 Location: Bristol Posts: 9 ![]() ![]() |
Yep, but I do own a Jag F-Pace with the V6 3.0D which is used in the RR & LR too so the issues are the same unfortunately ☹️ |
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Mohawk Member Since: 07 Oct 2025 Location: Bristol Posts: 9 ![]() ![]() |
Apologies if I offended the natives, it was not intentional. |
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Gremlin500 Member Since: 11 Mar 2022 Location: Newcastle, UK Posts: 1851 ![]() ![]() ![]() |
We get a few KIA owners on here occasionally…
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fisha Member Since: 25 Sep 2009 Location: Scotland Posts: 1552 ![]() ![]() |
Mohawk, all engines will burn some oil , granted it’s not meant to be loads, but they will burn it. Oil sweeps the cylinder walls and a film always remains after the piston down stroke, which will get burnt in the cylinder. Plus you just have to look at a typical intake of a diesel to see how oily the intake is from egr/, turbo seals etc etc. that still gets drawn into the cylinder as well.
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Mohawk Member Since: 07 Oct 2025 Location: Bristol Posts: 9 ![]() ![]() |
Fisha, I fully understand that and appreciate the explanation.
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Mikey Member Since: 10 Jan 2008 Location: Dundee Posts: 1874 ![]() ![]() |
So why not use a 10w40, or a 15w40? |
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JayGee Member Since: 27 Jul 2021 Location: London Posts: 3380 ![]() ![]() ![]() |
If I was running a V6 I’d be more concerned about the quality of the base stock used in the oil rather than anything else as it’s this that determines the film strength and how well metal on metal contact is avoided. Higher viscosity does not necessarily mean better film strength and larger viscosity ranges are achieved by viscosity modifiers which degrade due to oil shear in use so a 40 will drop to a 30 faster than a 30 to a 20 ( not seen evidence of the latter BTW) 2012 TDV8 Vogue (L322) |
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JayGee Member Since: 27 Jul 2021 Location: London Posts: 3380 ![]() ![]() ![]() |
It's way too thick to circulate in the engine on a cold start esp in temperate climates. 2012 TDV8 Vogue (L322) |
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