Yet another oil thread - KV6

Rover600 · 5th May 2023, 12:29

I know these topics can be a can of worms, but I'm maintaining several vehicles, most of which could be harmonised on 5w40.

Currently I'm using a 10w40 semi-synth (Mobil 2000) in the tourer as per the book figure, but I'd like to bulk buy oil to save on cost and storage - a decent high SAPS A3 5w40 synthetic, something like Mobil 3000 or Millers Trident.
I'm wondering if there is any good reason not to also use this 5w40 in the KV6 as well?

It seems to be the preferred grade now suggested for the 75 V6 by various oil suppliers. I know the KV6 doesn't *need* a fully synthetic with this cold viscosity, but if it does no harm, and simplifies servicing are there any other reasons not to go with it?

Thanks

maxi_crawf · 5th May 2023, 16:45

I've been using 5w40 fully synth in my 190 for a while now, had no problems as far as I can see in fact if anything it seems to reduce that slight rattle on start up.

bl52krz · 5th May 2023, 18:47

Millers Trident is a good oil. Used it in my 220SD diesel. Engine seemed to rev easier, and mpg was better.

ScreamingLordStokes · 6th May 2023, 01:17

I've also been pondering this topic for my KV6 and consulted Shell Lubematch which stated 5w-40 fully synth Helix Ultra as the premium option and Helix HX7 as the standard option. The Xpart fluid chart also states 5W-40 for the KV6 engine.
From the other threads on this subject it seems that some people prefer 10w-40 as it is the oil originally stated in the Rover handbook, and also for reasons of cost ie why pay more for a higher spec than required?
Although, shopping around, fully synthetic can generally be found at similar prices to semi synth. For example Triple QX fully synthetic is actually cheaper than their semi on the Eurocarparts site!
If you already use fully synth for other vehicles so presumably buy in bulk and it benefits you cost wise I see no reason not to use it.

Rich in Vancouver · 8th May 2023, 05:39

In North America 5-40 was the recommended weight for the Freelander 1 with the KV6. I have been using Castrol Edge in my KV6s for several years now with no issues. (Edge may be a North America only name)

Rover600 · 10th May 2023, 09:37

Good to know, thanks guys.
It did seem logical, but I thought it was worth asking first!

Quote:

Originally Posted by bl52krz

Millers Trident is a good oil. Used it in my 220SD diesel. Engine seemed to rev easier, and mpg was better.

Coincidently one of my other vehicles is a 220SDi, so this is interesting, again I think 15w40 mineral is the original spec -what viscosity are you using?

5th May 2023, 12:29	#1
Rover600 Newbie Rover 600 Join Date: Nov 2017 Location: Norfolk Posts: 29 Thanks: 0 Thanked 2 Times in 2 Posts	Yet another oil thread - KV6 I know these topics can be a can of worms, but I'm maintaining several vehicles, most of which could be harmonised on 5w40. Currently I'm using a 10w40 semi-synth (Mobil 2000) in the tourer as per the book figure, but I'd like to bulk buy oil to save on cost and storage - a decent high SAPS A3 5w40 synthetic, something like Mobil 3000 or Millers Trident. I'm wondering if there is any good reason not to also use this 5w40 in the KV6 as well? It seems to be the preferred grade now suggested for the 75 V6 by various oil suppliers. I know the KV6 doesn't need a fully synthetic with this cold viscosity, but if it does no harm, and simplifies servicing are there any other reasons not to go with it? Thanks

5th May 2023, 18:47	#3
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,444 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	Millers Trident is a good oil. Used it in my 220SD diesel. Engine seemed to rev easier, and mpg was better. __________________ Great Barr, Birmingham.

6th May 2023, 01:17	#4
ScreamingLordStokes Newbie Rover 75 Saloon Join Date: Mar 2023 Location: Sheffield Posts: 27 Thanks: 0 Thanked 0 Times in 0 Posts	I've also been pondering this topic for my KV6 and consulted Shell Lubematch which stated 5w-40 fully synth Helix Ultra as the premium option and Helix HX7 as the standard option. The Xpart fluid chart also states 5W-40 for the KV6 engine. From the other threads on this subject it seems that some people prefer 10w-40 as it is the oil originally stated in the Rover handbook, and also for reasons of cost ie why pay more for a higher spec than required? Although, shopping around, fully synthetic can generally be found at similar prices to semi synth. For example Triple QX fully synthetic is actually cheaper than their semi on the Eurocarparts site! If you already use fully synth for other vehicles so presumably buy in bulk and it benefits you cost wise I see no reason not to use it. Last edited by ScreamingLordStokes; 6th May 2023 at 09:46..

8th May 2023, 05:39	#5
Rich in Vancouver Gets stuck in MG ZT-T Join Date: Jun 2016 Location: White Rock, BC on Canada's Pacific Coast Posts: 865 Thanks: 338 Thanked 367 Times in 210 Posts	In North America 5-40 was the recommended weight for the Freelander 1 with the KV6. I have been using Castrol Edge in my KV6s for several years now with no issues. (Edge may be a North America only name) __________________ ZT-T190, Anthracite, LHD, Left the Line on June 24, 2002, Sold new in Switzerland, spent time in Germany, Imported to Canada in September 2021

5th May 2023, 16:45	#2
maxi_crawf Posted a thing or two R75 Saloon Conn CDT SE, MG ZT190+ Join Date: Nov 2006 Location: Kingston-upon-Hull Posts: 1,960 Thanks: 823 Thanked 426 Times in 274 Posts	I've been using 5w40 fully synth in my 190 for a while now, had no problems as far as I can see in fact if anything it seems to reduce that slight rattle on start up.