↓ Advertise on Defender2 ↓

Home > Technical > Motul Gear 300 75w-90 Fully Synthetic for Lockers?
Post Reply  Down to end
Page 1 of 2 12>
Print this entire topic · 
John P



Member Since: 26 Dec 2013
Location: West Sussex
Posts: 311

United Kingdom 2012 Defender 90 Puma 2.2 SW Corris Grey
Motul Gear 300 75w-90 Fully Synthetic for Lockers?
I have just installed Ashcroft lockers front and rear. Do I need a special diff oil, or can I use what I have always been using, which is Motul Gear 300 75w-90 Fully Synthetic?

Thanks
John
Post #1041344 30th Jul 2024 9:09am
View user's profile Send private message View poster's gallery Reply with quote
bankz5152



Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2147

2004 Defender 110 Td5 DCPU Epsom Green
Should be mineral EP90 according to Xcess4x4 Instagram @defender_ventures
Empire Tuning - Agent
Post #1041345 30th Jul 2024 9:11am
View user's profile Send private message View poster's gallery Reply with quote
John P



Member Since: 26 Dec 2013
Location: West Sussex
Posts: 311

United Kingdom 2012 Defender 90 Puma 2.2 SW Corris Grey
Yes that's what Nige told me, but surely synthetic would be better? Do you know why it should be mineral?
Post #1041347 30th Jul 2024 9:13am
View user's profile Send private message View poster's gallery Reply with quote
bankz5152



Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2147

2004 Defender 110 Td5 DCPU Epsom Green
Why you asking then Laughing

I believe its due to the bronze bushes and such, cant be certain but ive always used mineral EP90 in all my land rovers for the last 12 years. Always been good as gold. Instagram @defender_ventures
Empire Tuning - Agent
Post #1041349 30th Jul 2024 9:18am
View user's profile Send private message View poster's gallery Reply with quote
John P



Member Since: 26 Dec 2013
Location: West Sussex
Posts: 311

United Kingdom 2012 Defender 90 Puma 2.2 SW Corris Grey
It's that I have quite a few bottles of the Motul oil, so didn't really want to but something different.

So any EP90 would do then?

So something like this?
https://www.opieoils.co.uk/p-69297-millers...0-gl5.aspx
Post #1041350 30th Jul 2024 9:20am
View user's profile Send private message View poster's gallery Reply with quote
MK



Member Since: 28 Aug 2008
Location: Santiago
Posts: 2410

Chile 2007 Defender 110 Puma 2.4 SW Chawton White
ATB maufacturers do not recommend synthetic oil due to its "slipperiness" which affects the work principle of these diffs. I have not seen any test regarding this, but I just follows their recommendiation so I use reputable mineral oil based 80W-90 GL5 rated. Puma 110" SW

.............................................................
Earth first. Other planets later
Post #1041372 30th Jul 2024 12:26pm
View user's profile Send private message View poster's gallery Reply with quote
custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20294

United Kingdom 
Always GL4 in gearbox, GL4/5 transfer box, GL5 diffs.

Thats what I go by anyway, mineral EP90 is thick compared to fully synth.
Uses more fuel, not so sure mineral is so good with seas either such as the pinion oil seal.

Personally I would not be overly worried, just so long as GL4 is used in gearbox of which that’s a different topic anyway.

There is other factors such as anti foaming agents and things like that.

I used to use mineral but now use fully synthetic, better properties in the cold as well.

Mineral being thicker perhaps has a little more protection, but when you will be paying for that in fuel all the time by that loss of MPG you’ve probably bought a coupe of diffs anyway.

Perhaps worth checking the materials the lockers are made with hence the bronze component issues, I don’t think standard diffs have any bronze components but are hypoid gears etc.
I’m not an expert though, don’t profess to be but I wouldn’t go back to mineral personally but that’s just me.
If the component manufacturer explicitly state a specified grade though I’d stick to that, it’s probably due to the lockers components if that is the case. ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️
Post #1041379 30th Jul 2024 1:10pm
View user's profile Send private message View poster's gallery Reply with quote
John P



Member Since: 26 Dec 2013
Location: West Sussex
Posts: 311

United Kingdom 2012 Defender 90 Puma 2.2 SW Corris Grey
OK having taken all of the above into consideration and doing a lot reading I think I will be going for the Castrol TRANSMAX Axle EPX 80W-90, which is a mineral oil GL5.

https://www.opieoils.co.uk/p-724-castrol-t...fluid.aspx

The intended use of the vehicle, is for overlanding in remote areas. Africa, Australia, Canada, Alaska, USA and the like. So a lot of miles will be done.
Post #1041388 30th Jul 2024 2:17pm
View user's profile Send private message View poster's gallery Reply with quote
spudfan



Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4646

Ireland 
Yep GL4 for the main gearbox.
Comma have this https://www.commaoil.com/vrn-recommendatio...peId=82382 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai
Post #1041455 31st Jul 2024 10:47am
View user's profile Send private message View poster's gallery Reply with quote
MK



Member Since: 28 Aug 2008
Location: Santiago
Posts: 2410

Chile 2007 Defender 110 Puma 2.4 SW Chawton White
John P wrote:
OK having taken all of the above into consideration and doing a lot reading I think I will be going for the Castrol TRANSMAX Axle EPX 80W-90, which is a mineral oil GL5.

https://www.opieoils.co.uk/p-724-castrol-t...fluid.aspx

The intended use of the vehicle, is for overlanding in remote areas. Africa, Australia, Canada, Alaska, USA and the like. So a lot of miles will be done.


Consider maybe to add a final secondary diesel filter, high capacity transfer box sump and all the upgrades for those known glitches. Puma 110" SW

.............................................................
Earth first. Other planets later
Post #1041465 31st Jul 2024 11:52am
View user's profile Send private message View poster's gallery Reply with quote
John P



Member Since: 26 Dec 2013
Location: West Sussex
Posts: 311

United Kingdom 2012 Defender 90 Puma 2.2 SW Corris Grey
Indeed, I'm probably going over the top on modifications, but rather safe than sorry.
Post #1041473 31st Jul 2024 12:29pm
View user's profile Send private message View poster's gallery Reply with quote
spudfan



Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4646

Ireland 
I think that is one of the strengths of the old Defender. It is a capable vehicle but it can be a platform to add on additional items to make even more so if you require it.
I suppose that is what the Grenadier was supposed to be, the Defender with all the bits you might need but did not have to add on. 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai
Post #1041475 31st Jul 2024 12:36pm
View user's profile Send private message View poster's gallery Reply with quote
spudfan



Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4646

Ireland 
Re: Motul Gear 300 75w-90 Fully Synthetic for Lockers?
John P wrote:
I have just installed Ashcroft lockers front and rear. Do I need a special diff oil, or can I use what I have always been using, which is Motul Gear 300 75w-90 Fully Synthetic?

Thanks
John

Incidentally what do Ashcroft recommend? I would contact them and go with their recommendation for warranty purposes. 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai
Post #1041477 31st Jul 2024 12:46pm
View user's profile Send private message View poster's gallery Reply with quote
diesel_jim



Member Since: 13 Oct 2008
Location: hiding
Posts: 6088

United Kingdom 2006 Defender 110 Td5 SW Epsom Green
^^^ that
Post #1041489 31st Jul 2024 3:21pm
View user's profile Send private message View poster's gallery Reply with quote
John P



Member Since: 26 Dec 2013
Location: West Sussex
Posts: 311

United Kingdom 2012 Defender 90 Puma 2.2 SW Corris Grey
Nige from Xcess4x4 who built my diffs and works closely with Ashcroft and uses these diffs in his car recommended mineral EP90 GL4/GL5. So have purchased this type.
Post #1041491 31st Jul 2024 3:57pm
View user's profile Send private message View poster's gallery Reply with quote
Post Reply  Back to top
Page 1 of 2 12>
All times are GMT

Jump to  
Previous Topic | Next Topic >
Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Site Copyright © 2006-2024 Futuranet Ltd & Martin Lewis
DEFENDER2.NET RSS Feed - All Forums