 | Home > Technical > Motul Gear 300 75w-90 Fully Synthetic for Lockers? |
 
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| bankz5152 Member Since: 02 Feb 2017 Location: South London/North Kent Posts: 2155  
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Should be mineral EP90 according to Xcess4x4 Instagram @defender_ventures
Empire Tuning - Agent |
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30th Jul 2024 9:11am |
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| John P Member Since: 26 Dec 2013 Location: West Sussex Posts: 314  
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Yes that's what Nige told me, but surely synthetic would be better? Do you know why it should be mineral?
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30th Jul 2024 9:13am |
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| bankz5152 Member Since: 02 Feb 2017 Location: South London/North Kent Posts: 2155
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Why you asking then
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 |
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30th Jul 2024 9:18am |
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| John P Member Since: 26 Dec 2013 Location: West Sussex Posts: 314
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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 |
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30th Jul 2024 9:20am |
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| MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2414  
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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 |
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30th Jul 2024 12:26pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20307
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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 🇬🇧🇺🇸 ⭐️⭐️ |
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30th Jul 2024 1:10pm |
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| John P Member Since: 26 Dec 2013 Location: West Sussex Posts: 314
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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. |
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30th Jul 2024 2:17pm |
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| spudfan Member Since: 10 Sep 2007 Location: Co Donegal Posts: 4646 
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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 |
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31st Jul 2024 10:47am |
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| MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2414
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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 |
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31st Jul 2024 11:52am |
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| John P Member Since: 26 Dec 2013 Location: West Sussex Posts: 314
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Indeed, I'm probably going over the top on modifications, but rather safe than sorry.
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31st Jul 2024 12:29pm |
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| spudfan Member Since: 10 Sep 2007 Location: Co Donegal Posts: 4646
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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 |
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31st Jul 2024 12:36pm |
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| spudfan Member Since: 10 Sep 2007 Location: Co Donegal Posts: 4646
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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 |
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31st Jul 2024 12:46pm |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6092 
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^^^ that
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31st Jul 2024 3:21pm |
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| John P Member Since: 26 Dec 2013 Location: West Sussex Posts: 314
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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.
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31st Jul 2024 3:57pm |
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